For the reaction,
PCl5(g) PCl3(g) + Cl2 (g)
The forward reaction at constant temperature is favoured by:
1. Introducing an inert gas at a constant volume
2. Introducing chlorine gas at a constant volume
3. Introducing an inert gas at constant pressure
4. None of the above
According to Le-Chatelier's principle, adding heat to a solid liquid equilibrium will cause the :
1. Temperature to increase
2. Temperature to decrease
3. Amount of liquid to decrease
4. Amount of solid to decrease
H2S gas when passed through a solution of cations containing HCl precipitates the cations of the second group in qualitative analysis but not those belonging to the fourth group. It is because:
1. | Presence of HCl decreases the sulphide ion concentration |
2. | Presence of HCl increases the sulphide ion concentration |
3. | Solubility product of group II sulphides is more than that of group IV sulphides |
4. | Sulphides of group IV cations are unstable in HCl |
The addition of HCl does not suppress the ionization of:
1. | Acetic acid | 2. | Benzoic acid |
3. | H2S | 4. | H2SO4 |
In which of the following will the solubility of AgCl be the minimum?
1. | 0.1 M NaNO3 | 2. | Water |
3. | 0.1 M NaCl | 4. | 0.1 M NaBr |
Salting out action of the soap is based on:
1. Complex ion formation
2. Common ion effect
3. Solubility product
4. Acid-base neutralization
HI was heated in a sealed tube at 440C till the equilibrium was reached. At this point, HI was found to be 22 % decomposed. The equilibrium constant for this dissociation is :
1. | 0.28 | 2. | 0.08 |
3. | 0.02 | 4. | 1.99 |
In an acidic Buffer solution (CH3COOH + CH3COONa), the species mainly present in the solution are:
(Ignore negligible amount)
1. CH3COOH, CH3COO-, CH3COONa, H+
2. CH3COO-, Na+, CH3COOH
3. CH3COONa, CH3COO-, H+
4. CH3COO-, Na+, H+, CH3COONa
The most hydrolyzed salt among the following is-
(Assume that Kb of all weak bases is the same)
1. NH4Cl
2. CuSO4
3. AlCl3
4. All are equally hydrolyzed.
Inert gas is added to the equilibrium at constant pressure. The degree of dissociation will :
1. Remain unchanged
2. Decrease
3. Increase
4. Decrease or increase but cannot be predicted with certainty