Question

Which among the following are unsaturated hydrocarbons?

• A. ${\text{CH}}_{\text{3}}{\text{-CH}}_{\text{2}}{\text{-CH}}_{\text{2}}{\text{-CH}}_{\text{3}}$
• B.

  

• C.

  

• D.

  

Answer 1

Answer: (B), (D)

Explanation for correct option

(B) and (D)

Unsaturated hydrocarbon

• Unsaturated hydrocarbons contain carbon-carbon multiple bonds – double bonds, triple bonds, or both.
• In Option B, one triple bond is present, in option D, one double bond is present.
• So, hydrocarbon present in option (B), (D) are unsaturated hydrocarbons.

Explanation for incorrect option

• Saturated hydrocarbons contain carbon-carbon and carbon-hydrogen single bonds.
• The hydrocarbon present in (A) and (C) contains a single bond. So, it is a saturated hydrocarbon.
• Hence, options (A), and (C) are incorrect.

Hydrocarbons present in options (B), and (D) are unsaturated hydrocarbons. Hence, options (B), and (D) are correct.