Equilibrium · Question 30

Concentration of the Ag+ ions in a saturated solution of Ag2C2O4 is 2.2 10-4 mol L-1. Solubility product of Ag2C2O4 is

1. 2.66 10-12
2. 4.5 10-11
3. 5.3 10-12
4. 2.42 10-8

A 20 litre container at 400 K contains CO2(g) at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of CO2 attains its maximum value, will be (Given that : SrCO3(s) SrO(s) + CO2(g), Kp = 1.6 atm)

1. 10 litre
2. 4 litre
3. 2 litre
4. 5 litre

Consider the following liquid-vapour equilibrium. Liquid Vapour Which of the following relations is correct ?

1. d PdT2 = - HvT2
2. d PdT = HvRT2
3. d GdT2 = HvRT2
4. d PdT = - HvRT

MY and NY3, two nearly insoluble salts, have the same Ksp values of 6.2 10-13 at room temperature. Which statement would be true in regard to MY and NY3?

1. The salts MY and NY3 are more soluble in 0.5 M KY than in pure water.
2. The addition of the salt of KY to solution of MY and NY3 will have no effect on their solubilities.
3. The molar solubilities of MY and NY3 in water are identical.
4. The molar solubility of MY in water is less than that of NY3.

The percentage of pyridine (C5H5N) that forms pyridinium ion (C5H5N+H) in a 0.10 M aqueous pyridine solution (Kb for C5H5N = 1.7 10-9) is

1. 0.0060%
2. 0.013%
3. 0.77%
4. 1.6%

The solubility of AgCl(s) with solubility product 1.6 10-10 in 0.1 M NaCl solution would be

1. 1.25 10-5 M
2. 1.6 10-9 M
3. 1.6 10-11 M
4. zero

Which of the following fluoro-compounds is most likely to behave as a Lewis base ?

1. BF3
2. PF3
3. CF4
4. SiF4

If the equilibrium constant for N2(g) + O2(g) 2NO(g) is K, the equilibrium constant for 12 N2(g) + 12 O2(g) NO(g) will be

1. 12K
2. K
3. K2
4. K1/2

What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?

1. 2.0
2. 7.0
3. 1.04
4. 12.65

Which one of the following pairs of solution is not an acidic buffer ?

1. CH3COOH and CH3COONa
2. H2CO3 and Na2CO3
3. H3PO4 and Na3PO4
4. HClO4 and NaClO4