Question

Identify the unsaturated compounds from the following [1]

i) Butane

ii) Butene

iii) Chlorobutane

iv) Butyne

a) i and ii

b) ii and iii

c) ii and iv

d) I and iv​

Answer 1

Answer:

(ii) Propene CH

3

−CH=CH

2

and

(iii) Propyne CH

3

−C≡CH are the unsaturated compound as they contain carbon carbon multiple bond.

Answer 2

c) ii and iv, Butene and Butyne are unsaturated compounds.

Unsaturated compounds:

The compound with one double bond or one triple bond is called unsaturated hydrocarbon.

i) Butane - Since, butane has all single bonds and formula is $C_{4} H_{10}$ and is a saturated compound.

ii) Butene - Since, butene has one double bond and formula is $C_{4} H_{8}$ it is a unsaturated compound.

iii) Chlorobutane - Since, chlorobutane has all single bonds so it is a saturated compound.

iv) Butyne - Since, butyne has one triple bond and formula is $C_{4} H_{6}$ it is a unsaturated compound.

Therefore, Butene and Butyne are unsaturated compounds.