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 |
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
When NH4Cl is added in NH4OH solution, then pH of the solution
1. Increases
2. Decreases
3. Remains unchanged
4. Firstly decreases and more than decreases
Consider the nitration of benzene using mixed conc. H2SO4 and HNO3.
If a large amount of KHSO4 is added to the mixture, the rate of nitration will be:
1. | Slower | 2. | Unchanged |
3. | Doubled | 4. | Faster |
On adding NH4CI to an NH4OH solution, the pH of the solution will
1. | Increase | 2. | Decrease |
3. | Remain the same | 4. | Either increase or decrease |
Out of the reagents and aqueous will precipitate
1.
2.
3.
4.
When NH4Cl is added to an aqueous solution of NH4OH, then
1. Concentration of ions decreases.
2. Concentration of ions increases.
3. Concentration of ions as well as concentration ions increase.
4. Concentration of ions decreases.