Question

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

• A. Butane < 1 - Chlorobutane < 1 - Bromobutane < 1 - Iodobutane
• B. 1 - Iodobutane < 1 - Bromobutane < 1 - Chlorobutane < Butane
• C. Butane < 1 - Iodobutane < 1 - Bromobutane < 1 - Chlorobutane
• D. Butane < 1 - Chlorobutane < 1 - Iodobutane < 1 - Bromobutane

Answer 1

The correct option is A Butane < 1 - Chlorobutane < 1 - Bromobutane < 1 - Iodobutane

More the molar mass of compound,more will be boiling point.So boiling point order will be Butane$<1-$chlorobutane$<1-$bromobutane$<1-$iodobutane.

As molecular mass is increasing so boiling point also increase.