Science 9 Second Quarterly Exam 2024-2025 PDF

SECOND QUARTERLY EXAMINATION IN SCIENCE 9 **S.Y. 2024-2025** Name:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Date:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Section:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Score:\...

SECOND QUARTERLY EXAMINATION IN SCIENCE 9 **S.Y. 2024-2025** Name:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Date:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Section:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Score:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ I.MULTIPLE CHOICE. Read each questions carefully and choose the letter of best answer. 1\. Atom is defined as the ultimate indivisible particle of matter. Which of the following is true about the sub-atomic particles of atom? A. The electron is the central part B. The proton has negatively charge C. The electron is positively charge particle D. The proton and neutron found inside the nucleus 2\. An orbital is a region of space where there is high probability of finding \_\_\_\_\_\_\_\_\_. A. Electron B. Neutron C. Nucleus D. Proton 3\. Which of the following correctly describes electron configuration? A. Electrons are accommodated by a single orbital in one particular energy level B. Electrons are always arranged in pairs outside the nucleus C. Electrons are distributed in available orbitals from lowest to highest energy level D. Electrons are distributed in available orbitals from highest to lowest energy level 4\. Which of the following is the electronic configuration of an element with atomic number 10? A. 1s^2^ 2s^8^ B. 2s^2^ 2p^6^ C. 1s^2^ 2s^2^ 2p^6^ D. 1s^2^ 2s^4^ 2p^4^ 5\. Refer to this given, element X has atomic number of 12 and mass number of 22. What is the number of proton and electron? A. 10 B. 12 C. 22 D. 23 6\. Refer to this given, element X has atomic number of 20 and mass number of 40. The number of neutrons is equivalent to A. 10 B. 20 C. 30 D. 40 7\. Use the given electronic configuration: 1s^2^ 2s^2^ 2p^6^ 3s^2^ 3p^6^. What is the valence electron of the atom? A. 3 B. 4 C. 6 D. 8 8\. Use the given electronic configuration: 1s^2^ 2s^2^ 2p^6^ 3s^2^ 3p^6^. In which group and period in the periodic table does the element belong? A. Group 1, period 1 B. Group 2, period 4 C. Group 3, period 2 D. Group 8, period 3 9\. Elements A, B, C, D belong to the same family located at periods 2, 3, 4, 5 respectively. Which has the smallest atom? A. A B. B C. C D. D 10\. If the first and second energy level are full what would be the total number of electrons of an atom? A. 6 B. 8 C. 10 D. 18 11\. Which of the following is the electronic configuration of an atom of a noble gas? A. 1s^2^ 2s^1^ B. 1s^2^ 2s^2^ C. 1s^2^ 2s^2^ 2p^6^ 3s^2^ D. 1s^2^ 2s^2^ 2p^6^ 3s^2^ 3p^6^ 12\. Which statement best describes electrons? A. They are positively charge and are found in the nucleus. B. They are negatively charge and are found in the nucleus. C. They are positively charge and are found around the nucleus. D. They are negatively charge and are found around the nucleus. 13\. Which among the following shows that an atom is stable? A. Having 2 valence electrons B. Having 4 valence electrons C. Having 6 valence electrons D. Having 8 valence electrons 14\. On the basis of Rutherford's model of an atom, which sub-atomic particle is present in the nucleus of an atom? A. Neutron and electron B. Neutron and neutron C. Proton and electron D. Proton and neutron 15\. What makes the nucleus of the atom positively charged? A. Because of its position B. Because of proton inside it C. Because of proton and electron inside it D. Because of the electron whirling outside the nucleus 16\. Elements with valence electrons of 5, 6, 7 are classified as: A. Metals B. Non-metals C. Metalloids D. Noble gases 17\. Which of the properties of atoms is the most suitable reference for the kind of bond that will take place between /among them? A. Atomic size B. Electron affinity C. Electronegativity D. Ionization energy 18\. This is a force that hold two atoms together. A. Chemical bond B. Chemical formula C. Physical mass D. Physical name 19\. Write the chemical formula for a compound that has one aluminum atom and three chlorine atoms? A. AlCl B. AlCl~3~ C. Al~3~Cl D. Al~3~Cl~3~ 20\. How many electrons does Oxygen need to gain in order to have a full outer shell? A. 1 B. 2 C. 3 D. 4 21\. Which of the following elements accepts electrons more easily? A. Chlorine B. Magnesium C. Mercury D. Sodium 22\. What type of bond form between metal to non-metal elements? A. Ionic bond B. Metallic bond C. Non-Polar covalent bond D. Polar covalent bond 23\. Which of the below elements will most likely form a covalent bond? A. Al and Mg B. K and Cl C. K and Na D. H and O 24\. Why metals like gold are used to make jewelries and other accessories? A. Because of its luster B. Because of its purity C. Because of its low boiling point D. Because of its high melting point 25\. Why do elements bond? A. To become whole B. To become stable C. To create new element D. To create relationship 26\. Bromine atom has a tendency to gain electrons in order to attain stable configuration. Upon gaining electron from a metal element what will acquire of an ionic charge? A. - 1 B. - 2 C. + 1 D. + 2 27\. The number of electrons in sodium and chlorine creates chemical symbol and equation of Na ^+1^ + Cl ^-1^ = NaCl. What is the valence electrons of sodium? A. 1 B. 3 C. 5 D. 7 28\. What is maximum number of bonds can a carbon atom form? A. 2 B. 3 C. 4 D. 5 29\. Which of the following pairs of organic compounds is highly flammable? A. Alcohol, acetone B. Kerosene, acetone C. LPG, Gasoline D. Water, alcohol 30\. Helen is applying something to the ball bearings of the wheels of her bicycle so that friction will be minimized. Which of the following material do you think she is using? A. Isopropyl alcohol B. Kerosene C. Lubricating oil D. Vinegar 31\. Leonard has to remove the red paint from the paintbrush so that he could still use it again next time. What organic compound should he use? A. Acetic acid B. Formaldehyde C. Kerosene D. Lubricating oil 32\. A gasoline boy was being scolded by his store manager for smoking in the vicinity of the gasoline station. Why do you think the manager scolded his employee? A. Because gasoline is flammable B. Because gasoline is flowing C. Because gasoline is viscous D. Because gasoline is volatile 33\. Mang Steve, a fisherman went home with some of his catch and told his son to cook the fish. But his son said, "father the stove ran out of fuel already", Which organic compound do you think the boy will buy to cook the fish? A. Acetone B. Alcohol C. Kerosene D. Lubricating oil 34\. This is an example of aldehyde, use to preserve specimen. A. Alcohol B. Formalin C. Fuel D. Pesticide 35\. What is the usual use of methane? A. Acetone B. Food C. Fuel D. Pesticide 36\. In every 1 mole it is equivalent to how many particles? A. 6.02 x 10^23^ B. 6.02 x 10^24^ C. 6.02 x 10^25^ D. 6.02 x 10^26^ 37\. How can the knowledge about mole be useful for the environmentalists? A. Mole concept can be used in environmental monitoring B. It gives information on the most dangerous pollutant in the atmosphere C. It gives a feedback on the kinds of pollutants present in the atmosphere D. Mole concept can be used in quantifying the amount of pollutant particles released in the atmosphere 38\. How many nitrogen atoms are there in 1 mole of nitrogen molecules (N~2~) A. 2 B. 3 C. 4 D. 5 39\. Ethyl butanoate (C~3~H~7~COOC~2~H~5~) is the substance responsible for the aroma of pineapple. What is the molar mass of ethyl butanoate? A. 116 g/mole B. 117 g/mole C. 118 g/mole D. 119 g/mole 40\. People usually use hydrogen peroxide (H~2~O~2~- molar mass=34.02 g/mole), to clean their wounds. If Cheska used 1.0 gram of H~2~O~2~ to clean her wound, how many mole of H~2~O~2~ did she use? A. 0.035 moles B. 0.030 moles C. 0.029 moles D. 0.025 moles 41\. How many moles are there in 80 grams of sodium hydroxide (NaOH)? Atomic mass: Na=23, O=16, H=1 A. 0.5 moles B. 2.0 moles C. 4.0 moles D. 8.0 moles 42\. How many moles are there in 6.9 grams of sodium atoms? Atomic weight of Na=23 A. 0.2 moles B. 0.3 moles C. 2.0 moles D. 3.0 moles 43\. How can you apply knowledge on percentage composition? A. In maintaining the quality of food product B. In maintaining the quantity of food product C. In maintaining the amount of sugar present in the candy D. In maintaining the amount of hydrogen present in the antiseptic 44\. Some areas many fish and insect including the common housefly produce large amounts of glycerol (C~3~H~8~O~3~- molar mass 92.11 g/mole) to lower the freezing point of their blood. How many percent of oxygen is in glycerol? A. 50.11% B. 51.11% C. 52.11% D. 53.11% 45\. Ammonium nitrate (NH~4~NO~3~-molar mass 80.06 g/mole) is a substance use to produce dinitrogen monoxide, a dental anesthetic. Determine the mass percent of N in ammonium nitrate. A. 35.00% B. 39.50% C. 40.65% D. 43.60% 46\. Sulfuric acid (H~2~SO~4~) is a common catalyst in several industrial processes. ( mass number: H=1, S=32, O=16) What is the molecular mass of the compound? A. 49 g/mole B. 55 g/mole C. 98 g/mole D. 100 g/mole 47\. Sulfuric acid (H~2~SO~4~) is a common catalyst in several industrial processes. ( mass number: H=1, S=32, O=16) What is the perdentage composition of sulfur in the compound? A. 2.04% B. 32.65% C. 65.31% D. 100% 48\. Refer to the given formula CuSO~4~. (Mass number: Cu=64, S=32, O=16) How many copper, sulfur and oxygen atoms are in the formula? A. 1, 1, 4 B. 1, 4, 1 C. 2, 2, 4 D, 4, 2, 1 49\. Refer to the given formula CuSO~4~. (Mass number: Cu=64, S=32, O=16) What is the molecular mass of the compound? A. 160 g/mole B. 180 g/mole C. 260 g/mole D. 280 g/mole 50\. What is the percentage composition of oxygen in the compound CuSO~4~? A. 0.2% B. 0.4% C. 20% D. 40%