CHM 101 Likely Questions PDF

Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB CHM 101 LIKELY QUESTIONS 1. Range of pH scale is A)7 to 10 B)0 to 10 C)0 to 14 D)7 to 14 Answer: (c) 2. Level of p...

Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB CHM 101 LIKELY QUESTIONS 1. Range of pH scale is A)7 to 10 B)0 to 10 C)0 to 14 D)7 to 14 Answer: (c) 2. Level of pH found in antacid solution A)≤ 6.5 B)≥ 7.0 C)> 10 D)> 14 Answer: (b) 3. Three unknown solutions are given with pH value of 6, 8 & 9.5 respectively. Which solution will contain the maximum OH– ion? A)Solution sample-1 B)Solution sample-2 C)Solution sample-3 D)Data are insufficient Answer: (c) 4. pH of neutral salt is A)7 B)7 D)0 Answer: (a) 5. Ammonium sulphate salt is A)basic salt B)acidic salt C)neutral salt D)complex salt Answer: (a) 6. When sulphuric acid reacts with eggshell it produces A)hydrogen gas B)nitrogen gas C)carbon monoxide D)carbon dioxide gas Answer: (d) 7. In the Chlor-alkali process, the byproduct gases are A)hydrogen only B)hydrogen and oxygen gas C)hydrogen and chlorine gas D)chlorine and nitrogen gas Answer: (c) 8. The following salt is not hygroscopic in nature Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB A)NaCl B)MgCl C)CaCl2 D)KCl Answer: (a) 9. When more and more water is diluted with acids its H+ ion concentration will A)increase B)decrease C)remains the same D)depends on the type of acids Answer: (b) 10. When acids react with metal oxide it produces A)water and salt B)salts and hydrogen gas C)salts only D)no reaction takes place Answer: (a) 11. C-O bond length is minimum in (a) CO2 (b) CO32- (c) HCOO– (d) CO Answer: (d) Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB 12. Molecules are held together in a crystal by (a) hydrogen bond (b) electrostatic attraction (c) Van der Waal’s attraction (d) dipole-dipole attraction Answer: (c) 13. Sp3d2 hybridization is present in [Co(NH3)63+], find its geometry (a) octahedral geometry (b) square planar geometry (c) tetragonal geometry (d) tetrahedral geometry Answer: (a) 14. Find the molecule with the maximum dipole moment (a) CH4 (b) NH3 (c) CO2 (d) NF3 Answer: (b) 15. MX6 is a molecule with octahedral geometry. How many X – M – X bonds are at 180°? (a) four (b) two (c) three Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB (d) six Answer: (c) 16. Find the pair with sp2 hybridisation of the central molecule (a) NH3 and NO2– (b) BF3 and NH2– (c) BF3 and NO2– (d) NH2– and H2O Answer: (c) 17. The formal charge and P-O bond order in PO43- respectively are (a) 0.6, -0.75 (b) -0.75, 1.25 (c) 1.0, -0.75 (d) 1.25, -3 Answer: (b) 18. Which of the molecules does not have a permanent dipole moment? (a) SO3 (b) SO2 (c) H2S (d) CS2 Answer: (d) 19. p∏ – d∏ bonding is present in which molecule (a) SO32- Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB (b) CO32- (c) NO3– (d) BO33- Answer: (a) 20. Which one has a pyramidal shape? (a) SO3 (b) PCl3 (c) CO32- (d) NO3– Answer: (b) 21. How many orbitals can have the following set of quantum numbers, n = 3, l = 1, m1 = 0 ? (a) 3 (b) 1 (c) 4 (d) 2 Answer: (b) 22. Electronic configuration of the outer shell of the element Gd with atomic number 64 is (a) 4f4 5d5 6s1 (b) 4f3 5d5 6s2 (c) 4f5 5d4 6s1 (d) 4f7 5d1 6s2 Answer: (d) Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB 23. Maximum number of electrons in a subshell can be (a) 4l + 2 (b) 4l – 2 (c) 2n2 (d) 2l + 1 Answer: (a) 24. The orientation of atomic orbitals depends on their (a) spin quantum number (b) magnetic quantum number (c) azimuthal quantum number (d) principal quantum number Answer: (b) 25. A gas X has Cp and Cv ratio as 1.4, at NTP 11.2 L of gas X will contain_______ number of atoms (a) 1.2 × 1023 (b) 3.01 × 1023 (c) 2.01 × 1023 (d) 6.02 × 1023 Answer: (d) 26. Number of unpaired electrons in N2+ (a) 3 (b) 1 (c) 2 (d) 0 Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB Answer: (b) 27. The excitation energy of a hydrogen atom from its ground state to its third excited state is (a) 12.75 eV (b) 0.85 eV (c) 10.2 eV (d) 12.1 eV Answer: (a) 28. 3p orbital has _____ radial nodes (a) three (b) two (c) one (d) none Answer: (c) 29. A 0.66 kg ball is moving with a speed of 100 m/s. Find its wavelength (a) 6.6 × 10-34 m (b) 6.6 × 10-32 m (c) 1.0 × 10-32 m (d) 1.0 × 10-35 m Answer: (d) 30. How we will come to know that a given solution is acidic? A. If its pH value is less than 7 B. If its pH value is greater than 7 Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB C. If its pH value is less than 5 D. If its pH value is 5 Ans. A 31. What will be the litmus test if the solution is basic? A. Red litmus will turn to blue B. Blue litmus will turn to red C. No change in colour D. It will change into orange pink. Ans. A 32. What is the ph value of toothpaste? A. It ranges from 3 to 10 depending upon the additives added in it. B. It ranges from 5 to 12 depending upon the additives added in it. C. It ranges from 7 to 14 depending upon the additives added in it. D. It ranges from 6 to 8 depending upon the additives added in it. Ans. A 33. What is the pH value of pure alcohol? A. 7 B. 7.33 C. 7.80 D. 8 Ans. B 34. Kw is the ionisation constant for water and its value is: Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB A. 1 x 10-7 B. 1 x 107 C. 1 x 1014 D. 1 x 10-14 Ans. D 35. An acidic solution has: A. Less concentration of hydrogen ions than hydroxide ions. B. More concentration of hydroxide ions than hydrogen ions. C. More concentration of hydroxyl ions. D. Equal concentration of hydroxide and hydrogen ions. Ans. B 36. Which of the following not a kind of block in the periodic table? A) P B)S C)D D)A Ans. D 37. Lanthinium is represented by……….. A) LA B) LN C)Ln D) La Ans: D 38. What is the electronic configuration of Na+1 a) 1s2 2s2 2p6 3s2 b) 1s2 2s2 2p6 3s1 c) 1s2 2s2 2p6 d) 1s2 2s2 2p6 3s2 3p1 39. How many orbitals can have the following set of quantum numbers, n = 3, l = 1, m1 = 0 ? (a) 3 Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB (b) 1 (c) 4 (d) 2 Answer: (b) 40. Electronic configuration of the outer shell of the element Gd with atomic number 64 is (a) 4f4 5d5 6s1 (b) 4f3 5d5 6s2 (c) 4f5 5d4 6s1 (d) 4f7 5d1 6s2 Answer: (d) 41. Maximum number of electrons in a subshell can be (a) 4l + 2 (b) 4l – 2 (c) 2n2 (d) 2l + 1 Answer: (a) 42. The orientation of atomic orbitals depends on their (a) spin quantum number (b) magnetic quantum number (c) azimuthal quantum number (d) principal quantum number Answer: (b) 43. A gas X has Cp and Cv ratio as 1.4, at NTP 11.2 L of gas X will contain___ number of atoms Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB (a) 1.2 × 1023 (b) 3.01 × 1023 (c) 2.01 × 1023 (d) 6.02 × 1023 Answer: (d) 44. Number of unpaired electrons in N2+ (a) 3 (b) 1 (c) 2 (d) 0 Answer: (b) 45. The excitation energy of a hydrogen atom from its ground state to its third excited state is (a) 12.75 eV (b) 0.85 eV (c) 10.2 eV (d) 12.1 eV Answer: (a) 46. 3p orbital has ___ radial nodes (a) three (b) two (c) one (d) none Answer: (c) Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB 47. A 0.66 kg ball is moving with a speed of 100 m/s. Find its wavelength (a) 6.6 × 10-34 m (b) 6.6 × 10-32 m (c) 1.0 × 10-32 m (d) 1.0 × 10-35 m Answer: (d) 48. How we will come to know that a given solution is acidic? A. If its pH value is less than 7 B. If its pH value is greater than 7 C. If its pH value is less than 5 D. If its pH value is 5 Ans. A 49. What will be the litmus test if the solution is basic? A. Red litmus will turn to blue B. Blue litmus will turn to red C. No change in colour D. It will change into orange pink. Ans. A 50. What is the ph value of toothpaste? A. It ranges from 3 to 10 depending upon the additives added in it. B. It ranges from 5 to 12 depending upon the additives added in it. C. It ranges from 7 to 14 depending upon the additives added in it. Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB D. It ranges from 6 to 8 depending upon the additives added in it. Ans. A 51. What is the pH value of pure alcohol? A. 7 B. 7.33 C. 7.80 D. 8 Ans. B 52. Kw is the ionisation constant for water and its value is: A. 1 x 10-7 B. 1 x 107 C. 1 x 1014 D. 1 x 10-14 Ans. D 53. An acidic solution has: A. Less concentration of hydrogen ions than hydroxide ions. B. More concentration of hydroxide ions than hydrogen ions. C. More concentration of hydroxyl ions. D. Equal concentration of hydroxide and hydrogen ions. Ans. B 54. What are the properties arising due to varying concentrations of solute in a given solvent, irrespective of the nature of solute with respect to the solvent? Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB a) Colligative properties b) Intensive properties c) Extensive properties d) Solute properties 55. Which of the following is a colligative property? a) Relative lowering of fluid pressure b) Decrease in boiling point c) Decrease in freezing point d) Change in volume after mixing 56. Which law specifically governs the relative lowering of vapor pressures in solutions? a) van’t Hoff law b) Boyle’s law c) Raoult’s law d) Amagat’s law 57. If 1.5 grams of a non-volatile solute (MW = 100) is added to 200 ml pure CS2 (ρ = 1.3 g/cc) whose vapor pressure is 400 mm of Hg at 28.0°C, what is the resulting vapor pressure of the dilute solution? a) 401.246 mm Hg b) 398.754 mm Hg c) 401.754 mm Hg d) 398.246 mm 58. If the relative lowering of pressure of o-xylene is 0.005 due to addition of 0.5 grams of non-volatile solute in 500 grams of solvent, what is the molecular weight of the solute? a) 21.3 g/mole b) 23.1 g/mole c) 32.1 g/mole d) 1.23 g/mole Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB 59. On addition of non-volatile potassium iodide in water at 298K it is noticed that vapor pressure reduces from 23.8 mm Hg to 2.0 cm Hg. What is the mole fraction of solute in the solution? a) 0.916 b) 0.160 c) 0.084 d) 0.092 60. When a non-volatile solute is added to a solvent what is the difference in vapor pressure expressed as a faction of original vapor pressure equal to? a) Mole fraction of solute in vapor phase b) Mole fraction of solvent in vapor phase c) Mole fraction of solute in liquid phase d) Mole fraction of solvent in liquid phase 61. When 2.0 grams of copper (II) nitrate is added to 1000 ml of pure water, by how much is the vapor pressure of water decreased, given that at 20°C the vapor pressure of pure water is 17.535 mm Hg? a) 3.1 x 10-4 b) 0.303 c) 0.0333 d) 0.0033 62. Two components A and B have their pure vapor pressures in the ratio 1 ∶ 4 and respective mole fractions in solution in ratio 1 ∶ 2. What is the mole fraction of component B in vapor phase? a) 0.8889 b) 0.1250 c) 0.8000 d) 0.2000 Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB 63. Which of the following is Raoult’s law applicable to, in order to determine molar masses correctly? a) Ionic solute in liquid b) Non-ionic solute in dilute solution c) Non-ionic solute in concentrated solution d) Ionic solid in insoluble form in solvent 64. The total volume of the solution may not be equal to the sum of volumes of solute and solvent. This is because..... a) volume depends on temperature b) solute particles may occupy empty space structure of liquids C) solute particles are larger in size than solvent d) all of these Answer : b) solute particles may occupy empty space structure of liquids 65. 6g of urea was dissolved in 500 g of water. The percentage by mass of urea in solution is... a) 0.118 % b) 1.18 % c) 2.01 % d) 1.45 % Answer :b) 1.18 % 66. 54cm3 of ethyl alcohol was dissolved in 400 cm of water to form 454 cm3 of solution of ethyl alcohol. the Percentage by volume of ethyl alcohol in water is a) 0.118% b) 1.45 % c) 11.8 % d) 2.01 % Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB Answer : c) 11.8 % 67. 23 g of ethyl alcohol is dissolved in 54 g of water. The mole fraction of ethyl alcohol in water is..... a) 0.143 b) 0.110 c) 0.013 d) 1.12 Answer :a) 0.143 68. 23 g of ethyl alcohol is dissolved in 54 g of water. The mole fraction of water in solution is..... a) 0.1429 b) 0.8571 c) 0.1872 d) 0.3128 Answer : b) 0.8571 69. 35% (W/W) solution of ethylene glycol in water is used as antifreezer in automobiles in radiators as a coolent it lowers the freezing point of water to -17.6"C. The mole fraction of ethylene glycol is.... a) 0.927 b) 0.378 c) 0.8648 d) O.1351 Answer :d) O.1351 70. The number of moles of the solute present in 1 dm3 volume of the solution is known as.... a) molarity b molality C)normality Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB d) formality Answer :a) molarity 71. The physical properties of Solutions are mainly originated by intermolecular forces of attraction between...... a) solute molecules b) solvent molecules c) molecules in mixture d)ideal solution Answer :b) solvent molecules 72. A coarse mixture is formed when the sizes of the constituent components are relatively..... a) bigger b) small c) very small d) all Answer : a) bigger 73. The highest temperature at which vapour pressure of a liquid can be measured is...... a) inversion temperature b) critical temperature c) boiling point of liquid d) critical solution temperature Answer :c) boiling point of liquid Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB 74. Colloidal particles carry the charge.... a) negative b) positive c) positive or negative d) no charge Answer :d) no charge 75. Identify the incorrect statement about true solution... a) The size of solute particle is 108 cm b) It is homogeneous c) It is heterogeneous d) cant be separated into its components Answer :c) It is heterogeneous 76. A homogeneous mixture of two or more substances whose composition is not mixed and vary within the certain limit is known as..... a) True solution b) Ideal solution c) A colloidal dispersion d) A coarse mixture Answer :a) True solution 77. The homogeneous solution is formed due to force of attraction between the molecules or particles of...... a) solute only b) solvent only Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB c) solute and solvent d) all of these Answer : c) solute and solvent 78. The process in which there is the interaction between the solvent (water) and solute molecules to form the aggregates is known as....... a) hydration b) solvation c) aquation d) both (a and (b) Answer : d) both (a and (b). 79. The extent to which solute dissolves in solvent to form homogeneous solution depends on..... a) Nature of solute b) Nature of solvent c)Nature of solution d) both (a) and (b) Answer :d) both (a) and (b) 80. Water is called universal solvent. Most of the polar solutes dissolves into it because........ a) it is polar b) it is non polar c) it has high di-electric consta d) both a and c Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB Answer :d) both a and c 81. identify the incorrect statement a) solution may be binary, ternary or quaternary b) solutions prepared in water are non aqueous c) solution prepared in solvent other than water a non-aqueous d components ot true Solutions can't be separated by filtration Answer : b) solutions prepared in water are non aqueous 82. On the basis of physical states of solute and solvent, the possible number of types of solutions are....... a) 4 b) 3 c) 9 d) 5 Answer : c) 9 83. Sodium amalgam and silver amalgam are the following types of solution....... a) solid in liquid b) solid in solid c) liquid in solid d) Solid in mercury Answer : c) liquid in solid 84. Liquid in gas solution is....... a) Hg in Zn b) dry air Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB c) ethanol in water d ) moisture in dry air Answer : d ) moisture in dry air 85. The properties ot the solution depend upon the nature of........ a) solute b) solvent c) solution d ) all of these Answer : c) solution 86. Hydrogen in palladium is a kind of..... a) liquid in solid solution b) gas in solid solution c) solid in gas solution d) gas solution Answer : b) gas in solid solution 87. Ethanol present in water is a....... a) liquid solution b) liquid in liquid solution c)solid in liquid solution d) both'a' and 'b Answer : d) both 'a' and 'b 88. The amount of solute dissolved in a specific amount the solvent is known as..... a) dilution Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB b) dil. solutions c) conc. soluion d) concentration Answer : d) concentration 89. concentration of the Solutions may be expressed may percentage...... a) molarity b) molality c) percentage d) any of these Answer : d) any of these 90. concentration of the solution cannot be expressed in....... a) mole fraction b) mili gram c) normality d) ppm Answer : d) ppm 91. The process of fractional crystallisation can be carried out only if there exists...... a) difference in the solubility of the components b) the same solubility of the components c) both 'a' and 'b d) none of these Answer : a) difference in the solubility of the components Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB 92. From the solution of mixture of KNO, and NaNO, almost 90 % of total dissolved KNO , can be crystallized out by cooling to...... a) 50' C b) 10'C c) 0' C d) 25C Answer : c) 0' C 93. The technique of crystallisation is useful if the substance is....... a) highly soluble at lower temperature b) less soluble at high temperature c) highly soluble at higher temperature d) all of these Answer : c) highly soluble at higher temperature 94 The solubility of gas in liquid increases with....... a) decrease in pressure b) increase in pressure c) increase in temperature d) none of above Answer : b) increase in pressure 95. Solubility of solid in liquid is...... a) increases with increase in pressure b) increases with decrease in pressure c) becomes zero with any change Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB d) none of above Answer : d) none of above 96. Oxygen molecules has less solubility in water. This is because the oxygen molecule is....... a) non polar in nature b) polar in nature c) strong electrolyte d) amphoteric in nature Answer : a) non polar in nature 97. Aluminum Bronze contains... a) Al b) Cu c) Mn d) all Answer : d) all 98. an alloy of with tin and copper is called..... a) Bronze b) manganin c) Duralumin d) Babbitt metal Answer : d) Babbitt metal 99. The colligative properties of the solution depends on..... a) nature of the solute particles Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB b) number of solute particles c) nature of solvent d) both b and c Answer : d) both b and c 100. colligative properties are mainly used to determine..... Related: states of matter mcq with answers a) Molar mass of non-electrolyte solute b) Molar mass of solvent c) The boiling point of solvent d) Freezing point of solvent Answer : a) Molar mass of non-electrolyte solute 101. The relations derived by measuring colligative properties hold good for the dilute solutions having concentration..... a) less than 2 M b) less than 0.2 M c) greater than 0.2 M d) greater than 2 M Answer : b) less than 0.2 M 102. Which of the following is not a colligative property...... a) Elevation in boiling point b) Depression in freezing point c) Relative lowering of vapour pressure d) Vapour pressure Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB Answer : d) Vapour pressure 103. Among the following liquids, the slightly volatile is.... a) Ethyl acetate b) Ethyl alcohol c) Lubricating oil d) Acetone Answer : c) Lubricating oil 104.During the evaporation of liquid, the equilibrium is established between the two phases of the substance.These phases are......... a) both liquid b) liquid and its vapour c) two vapours d) all of these Answer : b) liquid and its vapour 105. At equilibrium........ a) rate of evaporation > rate of condensation b) rate of evaporation < Rate of condensation c) rate of evaporation=rate of condensation= 0 d) rate of evaporation = rate of condensation Answer : d) rate of evaporation = rate of condensation 106. The vapour pressure of the solution does not depend...... a) Nature of solvent Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB b) Temperature c) nature of solute d) all of these Answer : c) nature of solute 107. 0.05 M urea and 0.05 M sucrose solutions are separated by semipermeable membrane then direction of the flow of solvent is from... a) urea to sucrose b) sucrose to urea c) no flow ot solvent in either direction d) none of these Answer : c) no flow ot solvent in either direction 108. 3.0 g urea and 17.1 g sucrose are dissolved in lit of water each the solutions so formed are....... a) isotonic b) hypertonic c) hypotonic d non-hypotonic Answer : a) isotonic 109. A solution having the osmotic pressure higher than that of another is Known as....... a) isotonic b) hypotonic c) hypertonic d) normal Answer : c) hypertonic Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB  Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB 110. A solution having the osmotic pressure lower than that of another is known as........ a) Hypotonic solution b) Isotonic solution c) Hypertonic solution d) ideal solution Answer : a) Hypotonic solution Compiled by: Mst AGANGA-WILLIAMS ADURAGBEMI & Mst YUSUF ABDULRAFIU #CONFIDENCE POWERED BY: CHEMISTRY CLUB