Directions: Choose the best answer. Kindly complete the 1-20 items. LETTER only.
1. What is the common use of methane? a. artificial ripening agent c. fertilizer b. disinfectant d. fuel
2. Which of the following statements best describe organic compounds? a. Organic compounds are compounds that contain carbon and oxygen only b. Organic compounds are compounds that are produced by living things c. Organic compounds are composed mainly of carbon and hydrogen d. Organic compounds are compounds that contain carbon atoms only
3. Mang Mario, a fisher man, 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”. Then his father told him to buy some so that they could start cooking the fish. Which organic compound do you think the boy will buy? a. gasoline c. kerosene b. isopropyl alcohol d. lubricating oil
4.Which of the following pairs of organic compounds is highly flammable? a. gasoline, liquefied petroleum gas b. liquefied petroleum gas, kerosene c. lubricating oil, isopropyl alcohol d. water, ethyl alcohol
5. Which of the following formula shows its empirical formula? A. CH4 C. C3H5 B. C2H4 D. C2H6 6. An organic compound has the formula C15H32; it is classified as an______. A. Alcohol C. Alkene B. Alkane D. Alkyne 7. Which of the following hydrocarbons fit the general formula CnH2n+2? A. butane C. 1-butyne B. butene D. 2-butene 8. Ethene is a natural gas produced in plants, which acts as a natural ripening agent of fruits. Which of the following organic compounds has the same ability to ripen fruits? A. Acetylene C. Pentyne B. Butane D. Propene 9. Which of the following compounds is classified as an organic acid? A. CH3CH2CHO C. CH3CH2NH2 B. CH3CH2OH D. CH3COOH 10. The doctor advised his nurses to disinfect always. What compound should his nurses use as disinfectant? A. Acetic Acid C. Formaldehyde B. Ethyl Alcohol D. Ketone 11.To what group of hydrocarbon does the given molecule CH = CH with the structure belong? A. alkane B. alkene C. alkyne D.Benzene 12.Miggy’s mother was cooking their supper when she suddenly stopped and said, “Oh, the tank is already empty!” Then her mother asked him to buy another tank. What did Miggy’s mother asks him to buy? A. gasoline C. lubricating oil B. liquefied petroleum gas (LPG) D. water 13. Which of the following pairs of organic compounds is highly flammable? A. acetone, gasoline C. isopropyl alcohol, lubricating oil B. ethyl alcohol, water D. kerosene liquefied, petroleum gas
14. Mr. Estallo advised his students to preserve a bird for their project. What compound should his students use to preserve the bird? A. Acetone C. Formalin B. Ethyl alcohol D. Kerosene
15. Flowers and fruits emit sweet-smelling odor and varied flavors, what is responsible for the unique scent and flavors of flowers and fruits? A. Acetone C. Ester B. Alcohol D. Ketone 16. The following statement differentiate molecular unit from formula unit EXCEPT. a. Molecular unit is primarily for covalent formula while formula unit is primarily for ionic bonding. b. Molecular unit is used for compounds that are made up of molecules while formula unit is used for compounds that are made up of ions. c. Molecular unit indicates the number and types of atoms in individual while formula unit is the sum of atomic masses of the atom. d. Molecular and formula mass are both used unified atomic mass unit. 17 .Which of the following statement is TRUE about molecular unit? a. A molecular formula indicates the number and types of atoms in molecules. b. A molecule is the sum of the atomic masses of the atom in the compound’s formula. c. Uses for compounds that are made up of ions. d. Convenient as it can be used for both ionic and covalent compounds. 18. Which among the following compound got the heaviest formula mass? a. NaCl b. CuSO4 c. Ca3(PO4)2 d. AsCl3 19 .Ethyl butanoate (C3H7COOC2H5) is the substance responsible for the aroma of pineapple. What is the molecular mass of ethyl butanoate? a. 116 amu b. 117 amu c. 118 amu d. 120 amu 20. Baking soda has the formula NaHCO3.What is the formula mass of NaHCO3? a. 76 amu b. 80 amu c. 84 amu d. 88 amu
