Question

Which pair(s) of liquids on mixing is/are expected to show no net volume change and no heat effect?

• A. Acetone and ethanol.
• B. Chlorobenzene and bromobenzene.
• C. Chloroform and benzene.
• D. n-Butyl chloride and n-butyl bromide

Answer 1

Answer: (B), (D)

The correct options are
B Chlorobenzene and bromobenzene.
D n-Butyl chloride and n-butyl bromide

${\Delta }_{mixing}V=0;{\Delta }_{mixing}H=0\Rightarrow$ for ideal solutions.

Chlorobenzene and bromobenzene forms ideal solution.

n-Butyl chloride and n-butyl bromide also forms ideal solution.

Remaining form non-ideal solutions.

Hence, options B and D are correct.