question_answer 88)

  Colligative properties are observed when.......... (a) a non-volatile solid is dissolved in a volatile liquid (b) a non-volatile liquid is dissolved in another volatile liquid (c) a gas is dissolved in non-volatile liquid (d) a volatile liquid is dissolved in another volatile liquid

Answer:

                  (a, b) When any of one component of binary mixture either solvent or solute is volatile it causes deviation from ideal behaviour and vapour pressure of solution which causes change in colligative property. Hence, (a) and (b) are correct.