Attempt all questions :
1. Fill in the blanks :
(a) Two liquids are partially miscible when the intermolecular attraction of one liquid is _____ from that of the other .
(b) The ppm of a solute is defined as the mass of solute (in grams ) present in _____ grams of solution .
(c) The vapour pressure of a liquid ______ with increase in temperature .
(d) For a non ideal solution showing positive deviation from Raoult's law , ∆Hmixing is _______ .
(e) ∆Tf = Kf × ______ .
2. Answer the following questions :
(a) Define the terms : molarity , molality and normality .
(b) Define vapour pressure of a liquid. What is the effect on vapour pressure when a non - volatile solute is added to it ?
(c) What are colligative properties ? Explain two of them .
(d) Define Raoult's law .
(e) Explain the difference between osmosis and diffusion .
(f) What do you understand by relative
lowering of vapour pressure ? How is it measured ?
3. An aqueous solution of a non volatile
and non electrolytic substance boils at
