Question

Which is the correct increasing order of boiling points of the following compounds?
1 - Bromoethane, 1 - Bromobutane, 1 - Bromobutane, Bromobenzene

• A. Bromobenzene < 1 - Bromobutane < 1 - Bromopropane < 1 - Bromoethane
• B. Bromobenzene < 1 - Bromoethane < 1 - Bromopropane < 1 - Bromobutane
• C. 1 - Bromopropane < 1 - Bromobutane < 1 - Bromoethane < Bromobenzene
• D. 1 - Bromoethane < 1 - Bromopropane < 1 - Bromobutane < Bromobenzene

Answer 1

Answer: (D)

1 - Bromoethane < 1 - Bromopropane < 1 - Bromobutane < Bromobenzene

The boiling point of Bromobenzene is ${156}^{\circ }$ C. Boiling point of 1 - Bromobutane is ${102}^{\circ }$ C. Boiling point of 1 - Bromopropane is ${71}^{\circ }$ C and that of 1- Bromoethane is ${38}^{\circ }$ C.

Threfore, D is the correct option.