Carbon compound

Which of the following organic compounds has four carbon

atoms in its molecule?

• Ethane

• Propene

• Butanol

• Pentanoic acid

Which of the following is the general formula for alkyne?

• C_nH_2n

• C_nH_2n+2

• C_nH_2n-2

Which process converts ethanol to ethanoic acid?

• Hydrogenation

• Oxidation

• Hydration

Which of the following are the correct properties for

compounds X and Y?

• X soluble in acid , Y soluble in alkali

• X can reacts with bromine ,

  Y does not react with bromine

• X does not react with acidified KMnO₄ ,

  Y react with acidified KMnO₄

• X produces a lot of soot when it burns ,

  Y does not produce soot when it burns

Compound P has the following characteristics:

- very soluble in water

- can be prepared from an alkene

What is probably compound P?

• C₂H₅COOCH₃

• CH₃COONa

• C₃H₇COOH

• C₂H₅OH_

The complete combustion of a hydrocarbon is represented by

the following equation:

CH_2x + xO₂ → CO₂ + xH₂O

What is the value of x?

• 2

• 3

• 4

• 5

Diagram 2 shows the structural formula of an ester contained in watermelon. What is the name of the ester based on the IUPAC nomenclature system?

• Butyl ethanoate

• Propyl ethanoate

• Ethyl propanoate

• Ethyl butanoate

Which of the following are unsaturated hydrocarbons?

• I only

• I and II

• II only

Liquefied petroleum gas (LPG) is composed mainly of propane that is used as fuel for vehicles. What are the characteristics for propane?

I Dissolves in water

II Exists as a gas at room temperature

III Has a high boiling point

IV Cannot conduct electricity

• I and III

• II and IV

• I and IV

• III and IV

Diagram 3 shows the structural formula of an isomer for an alkene. Name the isomer according to the IUPAC nomenclature system.

• 2-methylbut-2-ene

• 3-methylpent-2-ene

• 3-ethylbut-2-ene

• 2,2-dimethylbut-2-ene