Question

Which is the correct increasing order of boiling points of the following compounds?
1-Iodobutane, 1-Bromobutane, 1-Chlorobutane, Butane.

Options

• Butane < 1-Chlorobutane < 1-Bromobutane < 1-Iodobutane

• 1-lodobutane < 1-Bromobutane < 1-Chlorobutane < Butane

• Butane < 1-Iodobutane < 1-Bromobutane < 1-Chlorobutane

• Butane < 1-Chlorobutane < 1-Iodobutane < 1-Bromobutane.

Answer 1

Butane < 1-Chlorobutane < 1-Bromobutane < 1-Iodobutane

Explanation: 

Order of boiling point in halogen derivatives is:
RI > RBr > RCl > F > R.