# Equilibrium

### Freezing point of an aqueous solution is (-0.186)°C

Freezing point of an aqueous solution is (-0.186)°C. Elevation of boiling point of the same solution is Kb = 0.512 °C, Kf = 1.86 °C, find the increase in boiling point.

1. 0.186 °C
2. 0.092 °C
3. 0.0512 °C
4. 0.2372 °C

### The solubility product of a salt having general formula MX2

The solubility product of a salt having general formula MX2, in water is 4 × 10–12. The concentration of M2+ ions in the aqueous solution of the salt is

1. 1.6 × 10–4 M
2. 1.0 × 10–4 M
3. 2.0 × 10–6 M
4. 4.0 × 10–10 M

### The correct relationship between free energy change

The correct relationship between free energy change in a reaction and the corresponding equilibrium constant Kc is

1. ΔG° = RT ln Kc
2. -ΔG = RT ln Kc
3. -ΔG = RT ln Kc
4. -ΔG° = RT ln Kc

### Among the following acids which has the lowest pKa value

Among the following acids which has the lowest pKa value?

1. HCOOH
2. CH3CH2COOH
3. (CH3)2CH–COOH
4. CH3COOH

### Solubility product of silver bromide is 5.0x10^-13

Solubility product of silver bromide is 5.0x10-13. The quantity of potassium bromide (molar mass taken as 120 g mol–1) to be added to 1 litre of 0.05 M solution of silver nitrate to start the precipitation of AgBr is

1. 6.2 x 10-5 g
2. 5.0 x 10-8 g
3. 1.2 x 10-9 g
4. 1.2 x 10-10 g