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Carbon and its Compounds — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceCarbon and its Compounds1 Mark
MCQ
Identify the unsaturated compounds from the following:
  1. Propane.
  2. Propene.
  3. Propyne.
  4. Chloropropane.
  • A
    $(i)$ and $(ii)$
  • B
    $(ii)$ and $(iv)$
  • C
    $(iii)$ and $(iv)$
  • ✓
    $(ii)$ and $(iii)$
✓

Answer

Correct option: D.
$(ii)$ and $(iii)$
A hydrocarbon in which the two carbon atoms are connected by a 'double bond' or a 'triple bond' is called an unsaturated hydrocarbon.
  1. Propene, $\text{CH}_3\text{CH}=\text{CH}_2$
  2. propyne, $\text{CH}_3-\text{C}\equiv\text{CH}$ both have double and triple bonds, respectively hence unsaturated. Propane and chloropropane are saturated hydrocarbons which contain only single bonds.

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