The unit that relates concentration of solution with its vapour pressure is: 
1. Mole fraction.
2. Parts per million.
3. Mass percentage.
4. Molality.

On dissolving sugar in water at room temperature solution feels cool to touch. Dissolution of sugar will be most rapid under the following case is:

1.  Sugar crystals in cold water
2.  Sugar crystals in hot water
3.  Powdered sugar in cold water
4.  Powdered sugar in hot water

At equilibrium, the rate of dissolution of a solid solute in a volatile liquid solvent is:

Low concentration of oxygen in the blood and tissues of people living at high altitudes is due to:

Match the items given in Column I with the type of solutions given in Column II.

Codes:

The value of Henry's constant, K_H is ......... .

4 L of 0.02 M aqueous solution of NaCl was diluted by adding 1 L of water. The molarity of the resultant solution is:

K_H value for Ar(g), CO₂ (g), HCHO (g) and CH₄(g) are 40.39, 1.67, 1.83 × ${10}^{-5}$ and 0.413 respectively.

Arrange these gases in the order of their increasing solubility.

1.  HCHO < CH₄ < CO₂ < Ar

2.  HCHO < CO₂ < CH₄ < Ar

3.  Ar < CO₂ < CH₄ < HCHO

4.  Ar < CH₄ < CO₂ < HCHO

Which of the following factor (s) affect the solubility of a gaseous solute in the fixed volume of liquid solvent?

(i) Nature of solute

(ii) Temperature

(iii) Pressure

a. (i) and (iii) at constant T

b. (i) and (ii) at constant p

c. (ii) and (iii)

d. Only (iii)
Choose the correct option