The tendency of BF3, BCl3 and BBr3 to behave as Lewis acids decreases in the sequence:
1.
2.
3.
4.
The percentage degree of hydrolysis of a salt of weak acid (HA) and weak base (BOH) in its 0.1 M solution is found to be 10%. If the molarity of the solution is 0.05 M, the percentage hydrolysis of the salt should be -
1. 5 %
2. 10 %
3. 20 %
4. None of the above
If the molar concentration of is mol L–1, the concentration of chloride ions will be:
1. | 3.0 x 10-3 | 2. | 6.0 x 10-3 |
3. | 0.3 x 10-3 | 4. | 0.6 x 10-6 |
Reaction quotient for the reaction, is given by , .The reaction will proceed from right to left if Kc value is:
1. | Q<Kc | 2. | Q=0 |
3. | Q>Kc | 4. | Q=Kc |
The ratio of \({{K_{P}}\over{K_{C}}}\) for the reaction
1. | (RT)1/2 | 2. | (RT)-1/2 |
3. | RT | 4. | 1 |
The pair that represents a buffer solution among the following pairs is?
1. and
2. and
3. and
4. and
The mixture that can act like a buffer is:
1.
2.
3.
4. All of the above
An acid buffer solution can be prepared by mixing the solutions of:
1. Sodium chloride and sodium hydroxide
2. Sulphuric acid and sodium sulphate
3. Ammonium chloride and ammonium nitrate
4. Ammonium acetate and acetic acid
A buffer solution can be prepared from a mixture of:
I. Sodium acetate and acetic acid in water
II. Sodium acetate and hydrochloric acid in water
III. Ammonia and ammonium chloride in water
IV. Ammonia and sodium hydroxide in water.
1. I, III, IV
2. III, IV
3. I, II, IV
4. I, III