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1. A student studies that vinegar, which is a diluted form of ethanoic acid, freezes during winter. What does this suggest about the physical properties of pure ethanoic acid?

A. It has a low melting point B. It has a low boiling point C. It has a very high boiling point D. It has a very high melting point

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2. The electronic configuration of an element is found to be 2, 4. How many bonds can one carbon atom form in a compound?

A. 6 B. 2 C. 1 D. 4

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3. Which of the following belongs to a homologous series of alkynes?

A. C₆H₆ B. C₂H₄ C. C₃H₄ D. C₂H₆

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4. Methane, ethane and propane are said to form a homologous series because all are:

A. Saturated compounds B. Differ from each other by a CH₂ group C. Hydrocarbons D. Aliphatic compounds

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5. A student studies that a soap molecule has two ends, one of which is an ionic end, and the other is the carbonic chain. Which option explains the interaction of a soap molecule with oil?

A. Ionic end of the soap interacts with the oil B. Carbonic chain end of the soap interacts with the oil C. The closest end of the soap interacts with the oil D. Ends of the soap randomly interact with the oil

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6. Which of the following is the molecular formula of cyclobutane?

A. C₄H₈ B. C₄H₆ C. C₄H₁₀ D. C₄H₄

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7. How many single bonds are present in methane?

A. Five B. Three C. Six D. Four

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8. The following chemical reaction shows the addition of chlorine to methane in the presence of sunlight: CH₄ + Cl₄ → X. What is likely to be the product of the reaction represented by “X”?

A. CH₃Cl + H₂SO₄ B. CH₃Cl + HCl C. CHCl₃ + HCl D. CH₄+ H₂SO₄

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9. Choose the correct statement.

A. In ethane, the two carbon atoms share one pair of electrons among themselves to form one carbon-carbon single covalent bond B. Each carbon atom shares three electrons with three hydrogen atoms to form three carbon-hydrogen single covalent bonds C. All of the above D. The ethene molecule is made up of 2 carbon atoms and 4 hydrogen atoms

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10. A hydrocarbon should have a minimum of ______ carbon atoms to show isomerism.

A. Five B. Six C. Three D. Four

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11. A carbon compound contains two atoms of carbon. Which name should the carbon compound bear?

A. Methane B. Propane C. Butane D. Ethane

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12. Which of the following is not a characteristic of fullerenes?

A. Of all the fullerene, the C₆₀ allotrope is the most stable B. Its hardness is lower than that of a diamond C. Its shape is similar to that of a soccer ball D. It contains only fused six-membered carbon-carbon rings

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13. The following chemical reaction shows the addition of chlorine gas to hydrocarbon in the presence of sunlight. CHCl₃ + Cl₂ → CCl₄ + HCl. How does chlorine react to a hydrocarbon compound in the presence of sunlight?

A. It adds an oxygen atom to the compound B. It breaks double and triple bonds into a single bond C. It substitutes hydrogen atom from the compound D. It adds hydrogen to the compound

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14. Which of the following is the property of ionic compounds?

A. They conduct electricity in solution or in a molten state B. Both (a) and (b) C. None of the above D. They have high melting and boiling points