3rd prep Final 2023-1.pdf

STUDY ON LINE  3rd prep. V W w q I R V Q V I t I t Mendel's laws Law of segregation of factors (Men...

STUDY ON LINE  3rd prep. V W w q I R V Q V I t I t Mendel's laws Law of segregation of factors (Mendel‘s 1st law): If two individuals are different in pair of alternative (contrasting) traits copulate, only dominant appears in first generation and two characteristics appear in second generation at ratio (3:1) Parents Pure (dominant) yellow pea X Pure (recessive) green pea genotype YY yy Gametes Y y First Generation (F1): Yy: 100 % Hybrid Dominant yellow pea P: Hybrid Yy X Hybrid Yy G: Y y Y y F2: YY Yy Yy yy 75% Dominant 3 :1 25% Recessive P: Hybrid Yy X Pure yy G: Y y y y F2: YY Yy yy yy 50% Dominant : 50% Recessive 2 Final Revision  3rd prep. Inheritance of two pairs of allomorphic traits (Mendel‘s 2nd law): If two individuals are different in two pairs or more of alternative (contrasting) traits copulate the trail of each pair is inherited independently and appears in second generation at ratio of (3:1) STUDY ON LINE 3 Final Revision  3rd prep. 1- The blue color of copper hydroxide turns to black. Cu(OH)2 CuO + H2O (Blue color) (Black color) 2- The green color of copper carbonate turns to black colour. CuCO3 CuO + CO2 green (Black color) 3- The blue color of copper sulphate turns to black color. CuSO4 CuO + SO3. blue (Black color) 4- The red color turns to silver ppt. 2HgO 2Hg + O2 red (silver ppt.) 5- The white color of silver nitrate turns to yellowish white color. 2NaNO3 2NaNO2 + O2 6- Rapid decomposition occur in crashes to sodium azid forming nitrogen gas evolving. 7- 2 NaN3 Electric spark 2 Na + 3 N2 8- Zn + 2HCl ZnCl2 + H2 9- 2Na + 2H2O → 2NaOH + H2 + heat. 10- Cu + HCl → No reaction. 11- 2AL + 6HCl →2AlCl3 + 3H2↑ 12- Mg + CuSO4 → MgSO4 + Cu Copper sulphate Magnesium (blue) sulphate Copper reddish brown 1-Reaction between acid & alkali (neutralization reaction): 13- HCl + NaOH → NaCl + H2O 2-Reaction between acid and salt: 14- Na2CO3 + 2HCl → 2NaCl + CO2 + H2O 15- NaCl + AgNO3 → NaNO3 + AgCl ↓ Sodium chloride Silver nitrate Sodium nitrate Silver chloride white precipitate H2 + CuO   H2O + Cu Δ 16- 17- 2Na + Cl2   2NaCl 18- 2N2O5 → 4NO2 + O2 4 Final Revision  3rd prep. 1. The formation of silver color on heating red mercuric oxide. Because mercury which is silver in color is produced. 2HgO 2Hg + O2 red (silver ppt.) 2. The formation of black substance on heating green copper carbonate. Because copper oxide which is black in color is produced. CuCO3 CuO + CO2 green (Black color) 3. The color of blue copper sulphate changes into black by heating. Because copper oxide which is black in color is produced. CuSO4 CuO + SO3. blue (Black color) 4. The color of sodium nitrate changes into yellowish white by heating. Because sodium nitrite which is yellow in color is produced. 5. Sodium fires aren’t put out by water. Because sodium reacts quickly with water to form hydrogen gas that burns with pop sound. 6. Magnesium is more active than copper. Because magnesium lies before copper in the activity series. 7. Bubbles of gas evolve on adding aluminum ribbon in dilute hydrochloric acid. Because hydrogen gas is evolved. 8. Zinc reacts with dilute hydrochloric acid but copper doesn’t react with the same acid. Because copper can’t replace hydrogen. 9. Magnesium replaces copper in its salt solution. Because magnesium lies above copper in the activity series. 10. The formation of reddish brown precipitate on adding magnesium to copper sulphate solution. Because copper which is reddish brown in color is produced. 11. The blue color of copper sulphate disappears when adding magnesium to it. Because copper will be replaced by magnesium forming magnesium sulphate. 5 Final Revision  3rd prep. 12. Aluminum delays in its reaction with dilute hydrochloric acid unlike zinc although aluminum proceeds zinc in the chemical activity series. Due to the presence of aluminum oxide layer on the aluminum surface WHICH DELAY THE reaction 13. Silver nitrate solution can’t be kept in aluminum pots. Because aluminum reacts easily with silver nitrate as it replaces silver. 14. The formation of white precipitate on adding silver nitrate solution to sodium chloride solution. due to formation of silver chloride ( white ppt ). …………………………………………………………………………………………………………………..EQUATION 14. Sodium is a reducing agent while chlorine is an oxidizing agent in the reaction Because sodium loses an electron , while chlorine gains an electron. 15. In the reaction: H2 + CuO Cu + H2O copper oxide is an oxidizing agent. Because copper oxide gives oxygen. 16. Metals are considered reducing agents. Because metals usually tend to lose electrons. 17. Non-metals are considered reducing agents. Because they gain electrons in chemical reaction. 18. Oxidation and reduction are two concurrent processes that occur at the same time. Bec. The no. of electrons lost by reducing agent equal no. of electrons gained by oxidizing agent. 19. Gold doesn’t react with dilute acid. Because gold follows hydrogen in the reactivity series. 20. Magnesium substitutes copper in copper sulphate solution. Because magnesium is more active than copper. 21. Copper doesn’t react with dilute HCl. Because copper is less than hydrogen. 22. The reaction of ionic compounds is faster than the reaction of covalent compounds. Because ionic compounds break into ions. 23. A certain mass of iron filings reacts with acids, faster than the reaction of a piece of iron having the same mass. Because when the surface area of reactants increases the rate of reaction increases. 24. The speed of chemical reaction increases by increasing the concentration of 6 Final Revision  3rd prep. reactants. Because it increases the collisions between molecules. 25. The speed of chemical reaction increases by increasing temperature. Because it increases the collisions between molecules. 26. Magnesium reacts with concentrated hydrochloric acid faster than the dilute hydrochloric acid. Because when the reactants become more concentrated the speed of the reaction increases. 27. Food goes rotten in summer days if it isn’t frozen. Due to the increase in the speed of reaction done by bacteria. 28. The fridge is used to preserve food. Because the speed of reaction slows down by cooling. 29. In the electric circuit, the ammeter is connected in series. To measure the electric current intensity. 30. When two conductors have the same potential are connected, no electric current passes. Because there is potential difference between them= 0. 31. The voltmeter is connected across the two ends of a conductor. To measure potential difference across the conductor. 32. The voltmeter is connected across the two poles of a battery. To measure the (e.m.f.) for the battery. 33. Rheostat is used in some circuits. To control the current intensity and potential difference in the circuit. 34. Some electric cells are connected in the electric circuit in series. To obtain high e.m.f. 42. Mendel selected (chose) the pea plant to conduct his experiments. Because of the following reasons: Study on line - It is easy to be planted and it grows fast. WITH MR.SAID - Its life cycle is short. 01200428942 - Its flowers are hermaphrodite so it can be self-pollinated. 01552220406 - It can easily be pollinated artificially. - It produces large number of plants in generation. - It has contrasting traits. 43. Mendel removed the stamens from the flowers before the anther becomes mature. To prevent self-pollination. 44. Mendel covered the stigmas of all flowers, of pea plant during studying the 7 Final Revision  3rd prep. hereditary traits. To prevent mixed pollination. 45. Mendel let the pea plants self-pollinate for several generations. To be sure of purity of the trait 46. When a pure yellow pod pea is pollinated with a pure green pod pea plant, they produce plants that all are with green pods. Because the trait of green pod is dominant over the yellow pod 47. The curly hair trait dominants over the smooth hair trait. Because it appears even if its hybrid. 48. The recessive trait is always pure. Because it doesn’t appear unless the two genes of recessive trait aggregate. 49. The combustion of steel scours used for cleaning aluminium in jar contains oxygen is faster than its combustion in the air. Because when the conc. of reactants increases the rate of reaction increases. 50. The rate of chemical reaction is increased by increasing the reactants concentration. Because it increases the collisions between molecules. 51. The rate (speed) of chemical reaction increases by heating.. Because it increases the collisions between molecules. 52. DNA molecule is called the double helix. Because DNA is composed of two strands coiled around each other like a spiral ladder. 53. Gold does not react with diluted acids. Because gold is comes after hydrogen in the reactivity series. 54. Mendel removed the stamens from the flowers of pea plant during his experiments. To insure that the plant doesn’t self-pollinate. 55. It is preferred to use alternating current more than direct current. Bec. it can be transmitted for long distances and can be changed into direct current. 56. Rheostat is used in some electric circuits. To control the current intensity passing. 57. The ionic compound react faster than covalent compound. Because ionic compounds will be broken down into ions. 58. Copper doesn’t react with dilute HCl. Because copper comes after hydrogen in the reactivity series 8 Final Revision  3rd prep. 59. A gas evolves on putting a piece of aluminum in diluted hydrochloric acid. The occurrence of effervescence on putting a piece of aluminum in dilute HCl. Because substitution reaction occurs when aluminum replaces hydrogen as it comes before hydrogen in the reactivity series. 60. When a yellow pod pea plant is pollinated with a pure green pod pea plant, they produce plants that are all with green pods. Because the trait of green pods dominates over the trait of yellow pods in pea plant according to the principle of complete dominance. 61. Learn to walk in children is not considered as a genetic trait. Because it is acquired trait that cannot be transmitted from a generation to another. 62. Pituitary gland is called the master gland. Because it controls the actions of other endocrine glands. 63. The ability of rolling the tongue is a dominant trait in the human being. Because it appears even if its hybrid. What happen if: 1. Heating of sodium nitrate. A yellowish white substance of sodium nitrite is formed and oxygen gas evolves. …………………………………………………………………………………………………………………..EQUATION 2. Heating of red mercuric oxide "illustrate by balanced symbolic equation". ………………………………………………………………………………………………………. …………………………………………………………………………………………………………………..EQUATION 3. Heating blue copper hydroxide. ………………………………………………………………………………………………………. …………………………………………………………………………………………………………………..EQUATION 4. Pancreas does not secrete glucagon hormone. Blood sugar level increases causing diabetes. 5. The electric current intensity if the length of the rheostat wire increases. The electric current intensity decrease. 6. Adding a negative catalyst to rapid reaction. The speed of reaction decrease 7. Lack of iodine in man's food. Decrease in thyroxin secretion leading to simple goiter. 9 Final Revision  3rd prep. 8. Put a small piece of sodium in water. (write the chemical equation balanced) ………………………………………………………………………………………………………. …………………………………………………………………………………………………………………..EQUATION 9. Putting a piece of magnesium in blue copper sulphate solution. ………………………………………………………………………………………………………. …………………………………………………………………………………………………………………..EQUATION 10. When one of the endocrine glands does not act properly. Hormone disorder occurs. 11. Heating of sodium nitrate. ………………………………………………………………………………………………………. …………………………………………………………………………………………………………………..EQUATION 12. If the length of the rheostat wire increases (Related to the electric current intensity). The electric current intensity decreases. 13. A substance gains an electron or more during a chemical reaction. It will be reduced and changed into a negative ion and it became an oxidizing agent. 14. The stigma of the flower of pea plant uncovered during the study of the inherited traits. Cross-pollination with other flowers will occur. 15. Two conductors having the same electric potential are connected together by a wire. Touching two charged conductors by a conducting bar, the first conductor has an electric potential is equal to the electric potential of the second one. No electric current flows, because there is no potential difference. 16. Heating the solution resulting from the reaction between hydrochloric acid and sodium hydroxide. Water (H2O) evaporates and sodium chloride (NaCl) remains. 18. You keep food outside the refrigerator for a long time. Food becomes rotten due to increasing chemical reactions done by bacteria. 19. Two charged conductors touch and the electric potential of one conductor is 10 volt but the electric potential of the other conductor is 30 volt. The electric charges transfer from the second conductor to the first conductor until their electric potential becomes equal. 10 Final Revision  3rd prep. 20. Adding silver nitrate solution to sodium chloride solution. white ppt. of silver chloride is formed. NaCl + AgNO3 → NaNO3 + AgCl ↓ Silver chloride Sodium chloride Sodium nitrate Silver nitrate Sodium nitrate white precipitate 21. Replacing dilute hydrochloric acid by concentrated hydrochloric acid when reacting with magnesium. The speed of chemical react ion increases. 22. The gene cannot give its special enzyme. A gene failed to produce its own enzyme. Cannot show its trait. 23. Two pure individuals bearing two pairs of contrasting traits are crossed. The trait of each pair is inherited independently and all individuals of the first generation appear carrying the dominant traits only and in the second generation , the dominant and the recessive traitS appear at a ratio of 3 : 1 24. When the dominant gene exists with another for the same characteristic. The dominant trait appears. 25. the number of collisions when the temperature of the reaction is raised up. Increasing the number of collisions by increasing the temperature 26. When manganese dioxide (MnO2) is added in a test tube that contains hydrogen peroxide. The rate of decomposition of hydrogen peroxide increases. 27. If there is a mating between two individuals resulting in producing 50% dominant individuals and 50% recessive individuals. The dominant individuals are hybrid. 28. When the potential difference increases between two ends of a conductor with a fixed resistance in the closed circuit. The current intensity in the conductor increases. 11 Final Revision  3rd prep. 1. The............... hormone liberates the energy necessary for the body from food. a. growth b. estrogen c. thyroxin d. glucagon 2. The two factors of a hereditary trait are similar in the............... individual. a. pure b. hybrid c. recessive d. pure & recessive 3. The most active metal in the chemical activity series is............... a. copper. b. sodium. c. hydrogen. d. aluminum. 4. The............... is used to control the resistance in the electric circuit. a. rheostat b. ammeter c. voltmeter d. ohmmeter 5. To control the value of electric resistance in the electric circuit we use............... instrument. a. ohmmeter b. rheostat c. voltmeter 6. The............. is chemically composed of the nucleic acid DNA combined with protein. a. cytoplasm b. gene c. chromosome 7. Thermal decomposition of copper carbonate gives............... a. copper+ water. b. copper+ carbon dioxide. c. copper oxide+ carbon dioxide. d. copper oxide+ water vapor. 8. From the examples of electrochemical cells............... a. dry cell. b. dynamo. c. rheostat. d. ohmmeter. 9. From dominant traits in the human being are............... a. smooth hair b. wide eye c. no dimples d. presence of freckles 10. The active metal can replace the hydrogen of water which rises and produces......... a. metal hydroxide. b. metal oxide. c. metal carbonate. d. metal sulphate. 11. At the beginning of the reaction, percentage of reactants concentration equals........ a. 100% b.50% c. 0% d. no correct answer. 12. It is chemically composed of the nucleus acid DNA combined with protein............... a. cytoplasm. b. chromosome. c. gene. d. nucleus. 13................ is a non-radioactive element. a. Radium b. Uranium c. Zirconium d. Iron 14. All of the following are aims of the human genome project except............... a. obtaining desirable traits. b. understanding the human biology. c. discovering all of the human genes. d. identifying the single differences between one person and another. 12 Final Revision  3rd prep. 15. The Sliding Rheostat is used to............... in the electric circuit. a. measure the current intensity b. measure the potential difference c. change the resistance d. measure the electromotive force 16. The hormone which regulates the calcium level in the blood is............... a. calcitonin b. thyroxin c. insulin d. adrenalin 17. If an electric current of 0.2 ampere passes in an electric heater and the potential difference between its two ends is 220 volts, the heater's resistance is...... Ohm a. 20 b. 1100 c. 2200 d. 1000 18. The measuring unit of the electric current intensity is............... a. ohm. b. ampere. c. volt..coulomb. 19. White sodium nitrates decompose by heat into............... and oxygen. a. sodium nitrite b. nitrogen c. sodium oxide d. ammonia 20. The reaction of oil with caustic soda is considered as reaction............... a. relatively fast. b. relatively slower. c. takes several months. d. takes several years. 21. The quantity of electricity passes in conductor due to passing of electric current with intensity 2 amperes through time 20 minutes is............... coulomb. a. 10 b. 20 c. 40 d.. 2400 22................ is used to measure electric resistance of conductor. a. Ammeter b. Ohmmeter c. Voltmeter d. Rheostat 23................ is the hormone appears the male secondary sex characteristics. a. Insulin b. Estrogen c.. Testosterone d. Progesterone 24. The............... apparatus is used for measuring the electric current intensity. a. ohmmeter b. voltmeter c. ammeter d. rheostat 25. All of the following are factors affecting in the rate of chemical reaction expect....... a. the concentration of reactants. b. the nature of reactant. c. the nature of products. d. the temperature of the reaction. 26. Clear lime water turbid on passing............... gas through it. a. nitrogen dioxide b. suphur dioxide c. carbon dioxide d. (a and b) are correct 27. Alternating current is characterized by............... a. constant intensity. b. variable direction. c. variable intensity and direction. d. variable intensity. 28. According to Mendel's second law, The recessive trait appears in the second generation by a ratio of............... a. 50 % b. 100 % c. 7 5 % d. 25 % 29. The neutralization reaction occurs between............... a. metal and non-metal. b. acid and salt. c. copper and carbon. d. acid and alkali 30. All the following units measuring the current intensity except............... a. ampere. b. coulomb / second. c. joule / coulomb. d. volt / ohm. 13 Final Revision  3rd prep. 31. The electrical resistance can measured by us in............... a. ohmmeter. b. voltmeter. c. ammeter. d. rheostat. 32. One of the properties of the alternating current is............... a. constant intensity. b.variable direction and constant intensity. C.constant direction. d. variable intensity and direction. 33. The hormone which stimulates body organs to respond for emergencies is............... a. insulin. b. glucagon. c. adrenaline. d. estrogen. 34. Four similar electric cells are connected in series each one has e.m.f of 1.5 volt so the total e.m.f equal............... volt. a.3 b.6 c. 1.5 d. 12 35. Radioactivity phenomenon was known by............... a. Ohm. b. Becquerel. c.Ampere. 36. Sliding rheostat is used to............... in the electric circuit. a. measure the current intensity b. measure the potential difference c. change the resistance value 37. One of the properties of direct current is............... a. constant value and direction. b. constant value but variable direction. c. variable value but constant direction. 38................ liberates the energy necessary for the body from food. a. Growth hormone b. Thyroxin c. Estrogen 39. When magnesium replaces copper in its salt solution, a............ precipitate is formed. a. black. b. red c. reddish brown 40- The hormone which regulates the level of calcium in the blood is the ………….. hormone. a) 14alcitonin b) thyroxin c) progesterone d) adrenalin 41- Glucagon hormone is secreted by ………….. a) pituitary gland b) thyroid gland c) adrenal gland d) pancreas 42................ it is chemically composed of the nucleic acid DNA combined with protein. a. cytoplasm. b. chromosome. c. gene. 43. The............... hormone liberates the needed energy from the food stuff. a. growth. b. estrogen. c. thyroxin. 44. The............... is the only way for hormones to reach the target cells. a. saliva b. blood c. water d. ducts 45. Generating an alternating electric current is by using the............... a. rheostat. b. dynamo. c. dry cell. d. voltmeter. 47. The hormone responsible for appearance of female secondary sex characteristics is...a. thyroxin. b. adrenalin. c. estrogen. d. testosterone. 48. All the following metals replace hydrogen of acid except............... a. potassium. b. magnesium. c. silver. d. zinc. 14 Final Revision  3rd prep. 49. If an electric current of 0.2 amp. flows through an electric heater and potential difference between its two ends is 220 volt, its resistance equals to......... Ohms. a. 1100 b. 11 c. 110 d. 11000 50. From compounds which are decomposed by heat into metal and oxygen is............... a. Cu(OH)2 b. CaSO4 c. CuCO3 d. HgO 51. The two factors of hereditary trait are similar in the............... individual. a. pure b. hybrid c. recessive d. pure and recessive 53. From the dominant traits in the human being is the............... trait. a. straight hair c. absence of dimples in the face b. wide eyes d. presence of freckles in the face 54. According to Mendel's second law, each pair of the alternative traits is inherited Independently of the others and appears in the second generation at a ratio of............... a. 1 : 1 b. 2: 1 c. 3 : 1 d. 4: 1 55. Carbon dioxide evolves during thermal decomposition of............... compound. a. HgO b. CuSO4 c. CuCO3 d. Cu(OH)2 56. The ratio between the potential difference across two ends of a conductor and the electric current intensity passing through it is equal to............... a. e.m.f. b. electric current. c. quantity of electricity. d. electric resistance. 57. Double substitution reactions between salt solutions are accompanied by formationof............. a. metal. b. a precipitate. c. an oxide. d. a non-metal. 58- DNA molecule consists of ………….. strands. a) two b) three c) four d) five 59. The scientists............... discovered the means of how the gene controls the appearance of the hereditary trait. a. Mendel and Newton c. Johansen & Mendel b. Watson and Crick d. Badel and Tatum 60. All of the following are radioactive elements except............... a. radium. b. uranium. c. iron. d. cesium. 61. On adding silver nitrate solution to sodium chloride solution,............... is formed. a. a white precipitate of sodium nitrate b. a white precipitate of silver chloride c. a blue precipitate of silver chloride d. no precipitate 62. The measuring unit of the quantity of electricity is............... a. ampere. b. coulomb. c. volt. d. joule. 63. For measuring the electric resistance,............... device is used. a. ohmmeter b. ammeter c. voltmeter d. sliding rheostat 64- A process that involves the splitting of compounds into simpler compounds by the effect of electricity is called................. 15 Final Revision  3rd prep. a) simple substitution b) thermal decomposition c) electrolysis d) direct combination 65. If vaccination occurs between two individuals, both of them are hybrid and 200 members resulted from this vaccination, then the hybrid members produced may be............... individual. a. 50 b. 100 c. 150 d. 200 66- The reaction Cl2 +2e- 2 Cl - represents............... process. a. oxidation b. reduction c. association d. substituting 67. When hydrochloric acid reacts with sodium carbonate, then the reaction produces gas which............... a. turbid limewater. c. increases ignition. b. burns with pop sound. d. its color is red brown. 68. Which one of these traits is dominant in humans ?............... a. Smooth hair. b. Freckles in the face. c. Wide eyes. d. Absence of dimples. 69. The charge transmitted by a constant current of intensity one ampere in one secondis............... a. coulomb. b. volt. c. joule. d. ohm. 70. The most active metal in the chemical activity series is............... a. copper. b. sodium. c. hydrogen. d. aluminum. 71. The recessive trait appears in one of the sons if he inherited from his parents............. a. two dominant genes. b. one dominant gene. c. a recessive gene. d. a recessive gene and a dominant gene. 72. If a pollination occurs between two hybrid individuals, the product is 200 individuals,so the number of produced hybrid individuals is likely to be............... individual. a. 50 b. 100 c. 150 d. 200 73. The reaction in which double substitution occurs between the ions of two compounds to form two other new compounds is called............... reaction. a. double substitution b. simple substitution c. neutralization d. oxidation and reduction 74. Mendel chose the garden pea plant to conduct his researches for these reasons except one of them,............... a. it is easy to be planted the pea plant. b. it can self-pollinate. c. it can easily be artificially pollinated. d. its life cycle is long. 75................ consists of nucleic acid DNA joined with protein. a. The gene b. The thymine c. The chromosome d. The cytoplasm 76. The ceramic cells in the catalytic converter leads to............... a. increasing the surface area exposed to the reaction. b. increasing the concentration of the reactants. c. increasing the temperature. d. no correct answer. 16 Final Revision  3rd prep. 77. The............... is the only way for hormones to reach their sites of action. a. enzyme b. lymph c. blood d. duct 78. Man suffers from............... disease when his food lacks of iodine. a. dwarfism b. diabetes c. gigantism d. simple goiter 79. One of the properties of the direct current that it is............... a. changeable value. b. changeable direction. c. constant value and direction. 80. The rate of breaking up of hydrogen peroxide increases by the addition of............... a. manganese oxide. b. magnesium oxide. c. manganese dioxide. 81. According to Mendel's first law, the hereditary factors............... when gametes are formed. a. combine b. segregate c. disappear 82. The speed of most chemical reactions is............... by rising temperature. a. increased b. decreased c. not affected 83. The............... hormone liberates the needed energy from the food stuff. a. growth b. estrogen c. thyroxin d. testosterone 84. The disorder resulted from the increase of thyroxin hormone secretion in large amounts is the............... a. exophthalmic goiter. b. simple goiter. c. diabetes. d. dwarfism. 85. Insulin hormone stimulates body cells to............... glucose sugar from the blood. a. absorb b. hydrolyce c. decompose d. breakdown 86. At the end of the chemical reaction, the concentration of the reactants is............ % a. zero b. 50 c. 75 d. 100 87. The genetic structure of wrinkled yellow colored seeds of a pea plant is............... a. yySS b. YYSS c. yyss d. YYss 88. In the electric cell,............... energy is converted into electric energy. a. magnetic b. kinetic c. chemical d. light 89. When passing hydrogen gas on hot black copper oxide,............... process occurs for copper oxide. a. oxidation b. reduction c. thermal decomposition d. (a) and (b) together 90. Which of the following traits is recessive in the human being ?............... a. Wide eyes. b. Black hair. c. Presence of dimples. d. Presence of freckles. 91. When sodium atom loses an electron from its outermost energy level, it becomes........ a. oxidized. b. reducing agent. c. reduced. d. (a) and (b) are correct. 92- ………….. is the part of DNA in the cell nucleus. a) Gene b) Gamete c) Cytoplasm d) no correct answer 93. Which of the following traits is dominant in human being ?............... a. Smooth hair. b. Absence of dimples. c. Wide eyes. d. Presence of freckles. 94. When magnesium replaces copper in its salt solution, a.... precipitate is formed. a. black b. green c. red d. no correct answer. 17 Final Revision  3rd prep. 95. The value of the resistance of an electric conductor in an electric circuit is changed on changing the............... a. dimensions of the conductor. b. electric current intensity passing through it. c. quantity of electricity that passes through it. d. potential difference between its terminals. 96. The ceramic cells in the catalytic converter leads to............... a. increasing the surface area exposed to the reaction. b. increasing the concentration of the reactants. c. increasing the temperature. d. no correct answer. 97. Sodium bicarbonate is used in polishing silver by using a piece of............... during washing. a. copper foil b. zinc foil c. aluminums foil d. chrome foil 98................ element shares in composing thyroxin hormone. a. Iodine b. Iron c. Sodium d. No correct answer 99. If an electric current has 0.2 ampere passes through an electric heater and the potential difference between its terminals equals 220 volt, so the heater resistance equals............... ohm. a. 20 b. 1000 c. 1100 d. 2200 100. The reaction between silver nitrate and sodium chloride is from.......... reactions. a. fast b. intermediate c. slow d. very slow 101. From the dominant traits in the human being is............... trait. a. straight hair b. attached ear lobe c. narrow eyes d. absence of freckles 102. When dilute hydrochloric acid is added to calcium carbonate..... gas is evolved. a) CO2 b) H2 c) O2 d) CO 103. The blue colour of copper sulphate disappears and................. is formed by heating. a) black ppt b) red colour c) yellow ppt d) black colour 104. The following elements can replace hydrogen in dilute acids except........... element. a) Magnesium b) zinc c) copper d) sodium 105. The oxidizing agent is the compound which.............. during the chemical reaction. a) loses hydrogen b) gains oxygen c) loses oxygen 106. The percentage of hydrogen increases during..................... reactions. a) neutralization b) oxidation c) reduction d) substitution 107. In the reaction between sodium and chlorine to form sodium chloride, the oxidizing agent is................ 18 Final Revision  3rd prep. a) sodium b) chlorine c) sodium chlorine d) both sodium and chlorine 108. - Electrons are …………… charged particles. a) positively b) neutral c) negatively d) no correct answer 109. …………… is the measuring unit of the electric charges. a) coulomb b) Ampere c) volt d) no correct answer 110. …………… is used to measure the e.m.f of a battery. a) Voltmeter b) Ammeter c) Rheostat d) ohmmeter 111. …………… is the measuring unit of electric resistance. a) ohm b) ampere c) volt d) coulomb 112. As the length of rheostat wire increases, the current intensity …………… a) increases b) decreases c) constant d) there is no answer 113. Direct current can be produced from …………… a) electrochemical cells b) electric generators c) electric power stations d) electric motors 114. In the simple cell the …………… energy is converted into electric energy. a) kinetic b) magnetic c) chemical d) mechanical 115. In dynamo, ………… energy is converted into electric energy. a) magnetic b) kinetic c) chemical d) light 116. Alternating current is used in …………… a) electrolysis b) lighting house c) electroplating d) both a & c 117. Rockets use …………… fuel for flying a) gasoline b) kerosene c) natural gas d) nuclear 118. The two factors of a hereditary trait are similar in the ……….. individual. a) pure b) hybrid c) recessive d) a and c 119. Which one of these traits is recessive in humans ………….. a) curly hair b) wide eyes c) free ear lobe d) straight hair 120. ………….. put the model of DNA molecule. a) ohm b) Mendel c) Watson d) Johansson 1. The.................... is used to measure the electromotive force of the battery in measuring unit is called....................... 2. When magnesium replaces copper in its salt solution a precipitate its color is.................... is formed. 3. When glucose level is increased in blood, the pancreas secretes.................... hormone. 5. When the amount of glucose decreases in the blood, pancreas secretes................ hormone. 19 Final Revision  3rd prep. 6. In electric cell.................... energy is converted into electric energy. 7. Transmission of electric charges depends on the.................... between two conductors. 8. Breaking down the bonds between the molecules of the reactant substances and formation of new substances is called.................... 9. The thyroid gland secretes............... hormone that regulates the calcium level of the blood. 10. Henry Becquerel discovered the emissi6n of an unseen rays from.................... element. 11..................... hormone is responsible for female secondary sex character. 12. The.................... is used to measure the electric resistance in units known as.................... 13. Electrochemical cells convert.................... energy into.................... energy. 14. At the beginning of the chemical reaction, the concentration of reactants is....................%. 15. The traits that are not transmitted from one generation to another are called.............. traits. 16..................... is from the examples of electrochemical cells. 17..................... apparatus is used to measure the resistance in the electric circuit. 18. The chemical energy is converted into electric energy by.................... cells. 19. The scientific idea of the dominance of the curly hair trait over the straight hair trait is..................................... principle. 20. Dry cells produce.......... current, while electric generators produce.................... current. 22. Neutralization it is the reaction between an acid and an alkali forming........... and.............. 23. During the chemical reaction, the concentration of.................... decreases, while the concentration of.................... increases by the time. 25. Chromosome is chemically composed of.......... which is combined with.......... 26. The resistance of a conductor that (1) ampere is passed through it when the potential difference between its terminal is (1) volt = ………....... 27. The hormone that secretes when the level of calcium increase in blood is the...... hormone. 28. The reactions of covalent compounds is........................... 29. Carbon dioxide gas detected by changes.................... into turbid. 30. Dry cells produce................ current. 31. In the beginning of the reaction, the concentration of the reactants is............... % 32. The measuring unit for absorbed radiation is................... 33. At the end of the reaction, the concentration of reactant is................. % 34. The scientist.......... is the founder of heredity. 35. When the amount of glucose decreases in the blood, pancreas secretes of............ hormone. 36. The............... is used to measure the current intensity in units known as................ 37. The plant formed its food during photosynthesis process from the reaction between.......... and.......... 20 Final Revision  3rd prep. 38. The instrument which is used to measure the electric potential difference is...................... 39. chromosome is chemically consisted of a nucleic acid called DNA binds with the........... 40. Sodium metal reacts with water producing sodium hydroxide and................ gas evolves. 41. The scientist Mendel named the trait that appears in all individuals of the first generation as the...................... trait, while the other (contrasting) trait that disappears in the individuals of the first generation as the...................... trait. 42. Na2CO3 +.......... 2NaCl + H2O+CO2 43. One of the properties of the direct current is that.............. 44. Every hereditary trait is controlled by two hereditary factors which separate during formation of the...................... 45........................ gas turbid the clear lime water. 46. The curly hair trait dominates over the straight hair trait is follows the principle of...................... in human being. 47. Some reactions are very slow and need several months to take place, such as the formation of...................... 48. The...................... project is interested in the effect of the various mutations on the function of the genes. 49. The electric current produced from electrochemical cells (batteries) is known as the...................... current. 50. The...................... is used to measure the electric resistance. 51. From very slow reactions which need several months is...................... 52. The pea plant is easy to...................... and its life cycle........................ 53. The speed of chemical reaction can be practically measured by the rate of.......... of reactants or the rate of...................... of resultants. 54. Endocrine glands secrete more than...................... hormones in the human body. 55. On passing hydrogen gas over hot copper oxide, copper oxide is converted into 56. On adding silver nitrate solution to sodium chloride solution, a white precipitate of........ is formed 57. Chemically ,the chromosome consists of the………………. nucleic acid bonded with protein. 58. The process of losing an electron or more is called…………………. 59. In ……………………… reactions, the compound is decomposed into its initial elements by heating. 60. Substance that gives oxygen or removes hydrogen is called…………………. 61. In the beginning of the reaction, the concentration of the reactants is……………% 21 Final Revision  3rd prep. 62. Covalent compounds are……………………… in their reactions. 63. The rate of chemical reaction is……………….. by increasing the temperature. 64. The measuring unit of the quantity of electricity is.............. 65. The measuring unit of the resistance of a conductor is.......... 66............. apparatus is used to measure the resistance in the circuit. 67........... hormone is secreted, when the percent of glucose sugar in the blood increased. 68. The speed of chemical reaction depends on.............................. and………………………. 69. increasing of growth hormone secretion in the childhood stage causes………………….. 70. Deficiency of insulin hormone secretion causes…………………………… 71. Dry cells produce…………………. current, while electric generators produce............current. 72. Electric current is generated in dynamo as a result of change…………….energy into……………. energy. 73. Copper hydroxide is decomposed by heat to…………….. and………………….. 1- A substance that loses one electron or more during a chemical reaction. 2- Process of breaking down the bonds between the molecules of reactants and formation of new bonds between the molecules of the products. 3- Reaction of an acid and a base to give salt and water. 4- Reaction involves replacing a metal by another one in its salt solution. 5- Change in the concentration of the reactants and products per unit time. 6- A substance that accelerates the rate of reaction and not participate in it. 7- Electric current intensity is directly proportional to potential difference between two terminals of a conductor at constant temperature. 8- An apparatus used to measure electromotive force. 9- 9٠ The state of a conductor that determines the transfer of electricity from or to it. 10- The resistance that faces the electric current during its passage in a conductor. 11- 11 - The unit that is used to measure the absorbed radiation. 12- Spontaneous conversion of the atoms of some elements existing in nature, trying to reach a more stable structure. 13- Flow the electric charges through a conductor. 14- Through which , the hereditary traits are transmitted from parents to offspring. 15- When two homozygous individuals differ in one pair of contrasting characters are 22 Final Revision  3rd prep. crossed, only the dominant trait appears in the first generation, and the two traits appear in the second generation by the ratio 3:1. 16- A structure consists of pentose sugar, a phosphate group and a nitrogenous base. 17- The changing of chemical composition of one gene or more. 18- Chemical substance regulates most human activities and functions. 19- Organs secrete hormones directly into blood stream. (1) Complete the following: 1- Most metal sulphate undergo thermal decomposition to give................ and.................... 2- The chemical activity series is the arrangement of metallic elements in a................. order according to their.................... 3 Chemical reaction is the process in which bonds in reactants are................. and bonds in..................... are formed. 4- Oxidation and reduction are two................ processes. 5- The substance that gives oxygen and removes hydrogen is called................ 6- In the following reaction: 2Mg + CO2  2MgO + C the oxidizing agent is................... while the reducing agent is................... (2) Choose the correct answer: 1- When dilute hydrochloric acid is added to calcium carbonate............... gas is evolved. a) CO2 b) H2 c) O2 d) CO 2- A process that involves the splitting of compounds into simpler compounds by the effect of electricity is called................ a) simple substitution b) thermal decomposition c) electrolysis d) direct combination 3- The blue colour of copper sulphate disappears and................. is formed by heating. a) black ppt b) red colour c) yellow ppt d) black colour 4- The following elements can replace hydrogen in dilute acids except............. element. a) Magnesium b) zinc c) copper d) sodium 5- The oxidizing agent is the compound which..................... during the chemical reaction. a) loses hydrogen b) gains oxygen c) loses oxygen 6- The percentage of hydrogen increases during..................... reactions. a) neutralization b) oxidation c) reduction d) substitution 23 Final Revision  3rd prep. 7- In the reaction between sodium and chlorine to form sodium chloride, the oxidizing agent is................ a) sodium b) chlorine c) sodium chlorine d) both sodium and chlorine (3) Put(√) or (x): 1- Metallic elements are arranged in an ascending order according to their chemical activity in the C.A.S. (………………………) 2- No reaction takes place between copper and zinc sulphate. (………………………) 3- Anhydrous copper sulphate decomposes by heat to give copper oxide and sulphur dioxide. (………………………) 4- Reduction means gaining of hydrogen. (………………………) (4) Write the scientific term: 1- A process of splitting compounds into simpler compounds by the effect of heat. [........................... ] 2- The arrangement of metallic elements according to decreasing chemical activity. [........................... ] 3- A process in which an element displaces another element in one of its salt solution. [........................... ] 4- It is the double exchange between the radicals of two compounds to give two other new compounds. [........................... ] 5- A reaction between acid and alkali to give salt and water.[........................... ] 6- A chemical substance which helps to increase the speed of the reaction but does not change itself. [........................... ] 7- The chemical process which leads to the increase of oxygen or decrease of hydrogen. [........................... ] 8- Two processes take place at the same time during the chemical reaction [........................... ] 9- A substance which gains one or more electrons during a chemical reaction. [........................... ] 10- The chemical process in which the atom of the substance gains one electron or more during the chemical reaction. [........................... ] (5) Give reason for: 1) When a magnesium strip burns in air a white powder is formed. 2) Silver element does not react with dilute sulphuric acid. 3) Formation of silvery material on heating red mercuric oxide. 4) Oxidation and reduction are two complementary processes in the same chemical reaction. (6) What is the effect of heat on the following?(by equation) 1- Copper sulphate 2- Copper hydroxide 24 Final Revision  3rd prep. 3- Copper Carbonate 4- Red mercuric oxide 5- Sodium nitrate (7) How can you differentiate between each of the following: 1- Hydrogen and carbon dioxide gases. (by flame) 2- Copper sulphate solution and magnesium sulphate solution. (by zinc metal) 3- Zinc sulphate solution and copper sulphate solution (by iron filings) (8) Mention the name of the gas in each of the following: 1) Turns lime water milky. 2) Is obtained by the reaction between dilute hydrochloric acid and magnesium metal. 3) Increase the glowing of lighted splint. 4) Is produced from the thermal decomposition of sodium nitrate. (1) Complete: 1- The current intensity due to the flow of 2700 coulomb in 300 second through a cross-section of a conductor equals ……… 2- In the electric circuits, the ammeter is connected in …………, while the voltmeter is connected in …………… 3- Volt = 4- There are two types of electric current which are …………… and …………… 5- The …………… electric current can be transported only to short distance. 6- There are two methods of connecting electric cells which are …………… and …………… 7- …………, ………… and cesium are natural radioactive elements. 8- Nuclear energy is used in medicine in …………… and …………… of some diseases. (2) Write the scientific terms: 1- The flow of electric negative charges in a conducting material (……………). 2- A device used to measure the electric current intensity. (……………) 3- The work done to transfer unit of electric charge between two ends of a conductor. (……………) 4- The opposition to the flow of electric current in the conductor. (……………) 25 Final Revision  3rd prep. 5- The potential difference across the two poles of the battery when the circuit is opened. (……………) 6- The electric current of constant intensity and direction. (……………) 7- A type of connection of electric cells used to obtain high e.m.f. (……………) (3) Choose the correct answer: 1- Electrons are …………… charged particles. a) positively b) neutral c) negatively d) no correct answer 2- …………… is the measuring unit of the electric charges. a) coulomb b) Ampere c) volt d) no correct answer 3- …………… is used to measure the e.m.f of a battery. a) Voltmeter b) Ammeter c) Rheostat d) ohmmeter 4- …………… is the measuring unit of electric resistance. a) ohm b) ampere c) volt d) coulomb 5- As the length of rheostat wire increases, the current intensity …………… a) increases b) decreases c) constant d) there is no answer 6- Direct current can be produced from …………… a) electrochemical cells b) electric generators c) electric power stations d) electric motors 7- In the simple cell the …………… energy is converted into electric energy. a) kinetic b) magnetic c) chemical d) mechanical 8- In dynamo, ………… energy is converted into electric energy. a) magnetic b) kinetic c) chemical d) light 9- Alternating current is used in …………… a) electrolysis b) lighting house c) electroplating d) both a & c (4) Give reasons for: 1- The voltmeter is connected across the two poles of a battery. 2- Rheostat is used in some electric circuits. 3- Voltmeter is connected between the two ends of a conductor. 4- It is better to use alternating current rather than direct current. 5- Some cells are connected in the electric circuit in parallel. 1- Calculate the electric current intensity that flows through cross section of a wire, if a charge of 10 coulombs passes through in 2 seconds. 26 Final Revision  3rd prep. 2- Calculate the current intensity due to the flow of 5400 coulomb in 5 min. through a cross-section of a conductor. 3- What is the quantity of electricity which passes through a conductor its resistance 100 ohm for 30 minutes when the potential difference across its ends is 220 volts. 4- You have three similar cells, the electromotive force of each is 1.5 volt. Explain by using a diagram how you can connect them to obtain an e.m.f of: a) 1.5 volts b) 3 volts c) 4.5 volts (1) Complete: 1- …………... traits are not transmitted from one generation to another. 2- The scientist …………... is the founder of heredity, he used the seeds of ………... plant, because its flowers are ……….. and thus it can self-pollinated. 3- The trait that appears in all individuals of the first generation in Mendel’s experiments is …………... trait. 4- Chromosome is chemically composed of a nucleic acid called …………... which is combined with …………... 5- The two scientists …….. and …………... were able to make a model for DNA molecule. 7- The gene mutation occurs as a result of the change in the sequence of … of the gene. 8- Hormones are directly secreted into the blood stream by …………... 9- ……….. gland secretes ……... hormone which controls the general growth of the body. 10- Thyroxin is a …………... that regulates food assimilation in your body. (2) Write the scientific term: 1- The traits ready to be transmitted from one generation to another. (………………) 2- The trait that appears in all individuals of the first generation in Mendel’s experiments. (………………) 3- The hereditary factors which transmit traits from the parents to off spring. (………………) 4- Through which the hereditary traits are transmitted from parents to offspring. (………………) 5- Parts of DNA that are present on the chromosomes and carry the hereditary traits of the individual. (………………) 27 Final Revision  3rd prep. 6- It is chemically consisted of a nucleic acid called DNA combined with protein. (………………) 7- The mutations which are controlled by human to obtain desirable traits in specific living organisms and specially in the plants. (………………) 8- Organs secreting hormones in the human body. (………………) 9- A chemical message that controls and regulates the activities and functions of most of the body organs.(………………) 10- Hormone which stimulates the storage of glucose sugar level in the blood. (………………) 11- The result when one of the endocrine glands does not act properly. (………………) (3) Choose the correct answers: 1- Mendel conducted his experiments in pea plant by using ……….. pairs of traits. a) 5 b) 7 c) 9 d) 11 2- The ………….. hormone liberates the needed energy from the food stuff. a) growth b) estrogen c) thyroxin d) testosterone 3- The two factors of a hereditary trait are similar in the ……….. individual. a) pure b) hybrid c) recessive d) a and c 4- Which one of these traits is recessive in humans ………….. a) curly hair b) wide eyes c) free ear lobe d) straight hair 5- ………….. put the model of DNA molecule. a) ohm b) Mendel c) Watson d) Johansson 6- ………….. is the part of DNA in the cell nucleus. a) Gene b) Gamete c) Cytoplasm d) no correct answer 7- DNA molecule consists of ………….. strands. a) two b) three c) four d) five 8- Glucagon hormone is secreted by ………….. a) pituitary gland b) thyroid gland c) adrenal gland d) pancreas 9- The hormone which regulates the level of calcium in the blood is the ………….. hormone. a) calitonin b) thyroxin c) progesterone d) adrenalin (4) Give reasons for: 1- Mendel selected (choose) the pea plant to conduct his experiments. 2- The curly hair dominates the smooth hair trait. 3- The ability of rolling the tongue is dominant trait in the human being. 4- The free ear lobe is dominant over the attached ear lobe. 28 Final Revision  3rd prep. 5- DNA molecule is called the double helix. 6- Pancreas is a double function gland. 7- Diabetes disease is treated with insulin hormone. 8- Blood stream is the only way for hormones to reach their sites of action. 9- Pituitary gland is called the master gland. 10- The stopping of the body growth, so the person becomes a dwarf. 1- In pea plant, what are the results of self-pollination of tall hybrid plant pure, by using the symbols (T, t) showing (parents – gametes – offspring). ……………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………… 2- Using symbols to express the results of mating between a short stemed pea plant (tt) and a long stemed pea plant (TT) ……………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………… 3- If a black mouse BB is crossed to a brown female mouse (bb) mention the colours and the ratios of resulting offspring in the first generation and second generation illustrated on hereditary basis. ……………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………… 4- When a pea plant that has tall stem is crossed with a pea plant that has short stem, this crossing produced individuals with the ratio of 50% tall : 50 % short what is the genetic structure of parents and producing individuals (use “T” for tall “t” for short) ……………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………… 29 Final Revision  3rd prep. (1) Complete the following: 1. A member that gains one gene for freckles in the face becomes without feature. ( ) 2. The chemical reaction is a process of breaking up of bonds between molecules of reactants and formation of new bonds in products molecules. ( ) 3. The hybrid individual carries a gene for the dominant characteristic and another one for he recessive characteristic. ( ) 4. Reaction of iron filings (powder) with sulphuric acid H2SO 4 becomes slower than the reaction of block of iron with the same acid. ( ) 6. The glucagon hormone is secreted by pituitary gland. ( ) 7. The iron element shares in composing thyroxin hormone. ( ) 8. The decrease in secretion of insulin hormone causes diabetes disease. ( ) 9. Sodium carbonate is used in polishing silver. ( ) 10. Copper sulphate is decomposed by heat into black copper oxide and sulphur dioxide gas.( ) 11. To generate an alternating electric current, we use the coulomb. ( ) 12. The two factors of a hereditary trait are similar in the hybrid individual. ( ) 13. In the electric cell, the magnetic energy is converted into electric energy. ( ) 14. In positive catalytic reactions, catalyst is used to slow down the speed of the chemical reaction. ( ) 15. The electromotive force (e.m.f.) of several cells connected in parallel equals the electromotive force (e.m.f.) of one cell. ( ) 16. The two factors of a hereditary trait are similar in the hybrid individual. ( ) 18. Copper sulphate decomposes by heat into copper oxide and sulphur dioxide gas. ( ) 19. The acquired traits are not transmitted from one generation to another. ( ) 20. Mendel removed the stamens of pea plant flowers before the anther becomes mature during his experiments to prevent cross pollination with other flowers. ( ) 21. The oxidizing agent (factor) is the substance which takes oxygen away or gives hydrogen during a chemical reaction. ( ) 22. The electric current intensity passing through a conductor is directly proportional to the potential difference across it at a constant temperature. ( ) 23. Mendel's second law is called the law of segregation of factors. ( ) 24. Most metal sulphates decompose when they are heated to metal oxide and sulphur trioxide gas evolves. ( ) 25. Genes are parts of DNA found in the cytoplasm of the cell. ( ) 26. Ohmmeter is used to control the electric resistance in the electric circuit. ( ) 27. Aluminium reacts with diluted hydrochloric acid faster than the reaction of zinc with the same acid. ( ) 30 Final Revision 3rd prep. 1. 2. 3. 4. 5. 6. 7. 31 Final Revision 3rd prep. 8. 32 Final Revision 3rd prep. 33 Final Revision 3rd prep. 34 Final Revision 3rd prep. 35 Final Revision 3rd prep. 36 Final Revision 3rd prep. 37 Final Revision  3rd prep. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. 38 Final Revision 3rd prep. 39 Final Revision 3rd prep. 40 Final Revision 3rd prep. 41 Final Revision  3rd prep. from this figure if the electromotive force of each cell is two volts. find I. The reading of voltmeter ? 2. The reading of ammeter? 42 Final Revision