Dicky, Micky and Vicky had three liquids, A, B and C respectively. They mixed these liquids and observed that they form a homogeneous mixture. They wer unable to separate the liquidsand asked their teacher to separate these for them. The teacher subjected the given mixture to fractional distillation. Liquid B was obtained in the receiver flask. On further distillation, A was left behind in the distillation flask. On the basisof the results, comment on the critical temperatures of A, B and C in their respective gaseous states.

Dicky, Micky and Vicky had three liquids, A, B and C respectively. The

1.	Dicky, Micky and Vicky had three liquids, A, B and C respectively. They mixed these liquids and observed that they form a homogeneous mixture. They wer unable to separate the liquidsand asked their teacher to separate these for them. The teacher subjected the given mixture to fractional distillation. Liquid B was obtained in the receiver flask. On further distillation, A was left behind in the distillation flask. On the basisof the results, comment on the critical temperatures of A, B and C in their respective gaseous states.
Answer» SOLUTION :Fractional distillation is employed to separate miscible liquids which have a difference in their BOILING points. In this process of separation, the liquid with a low boiling point, i.e., a high vepour pressure, distils. THEREFORE, from the given data, it can be said the boiling point of B is less than that of C which is less than that of A. For liquids with high boiling points the intermolecular forces of attraction are also high, and hence, they have high critical temperatures. Therefore, the critical TEMPERATURE of A is greater than that of C which is greater than that of B.