Which salt undergoes hydrolysis?

1. CH₃COONa                                     

2. KNO₃

3. NaCl                                               

4. K₂SO₄

Three reactions involving ${\mathrm{H}}_2{\mathrm{PO}}_4^{-}$ are given below:

(i) H₃PO₄ + H₂O $\to$H₃O⁺ + ${\mathrm{H}}_2{\mathrm{PO}}_4^{-}$

(ii) ${\mathrm{H}}_2{\mathrm{PO}}_4^{-}$ + H₂O $\to$${\mathrm{HPO}}_4^{2-}$ + H₃O⁺

(iii) ${\mathrm{H}}_2{\mathrm{PO}}_4^{-}$ + OH^- $\to$H₃PO₄ +O^2-

In which of the above does ${\mathrm{H}}_2{\mathrm{PO}}_4^{-}$ act as an acid?

1. (i) only                                 

2. (ii) only

3. (i) and (ii)                           

4. (iii) only

The compound that does not act as Lewis acid is:

1. AlCl₃                                           

2. BF₃

3. NH₃                                             

4. FeCl₃

The conjugate base of [Al(H₂O)₃(OH)₃] is:

1. [Al(H₂O)₃(OH)₂]⁺                           

2. [Al(H₂O)₃(OH)₂O]^-

3. [Al(H₂O)₃(OH)₃]^-                           

4.  [Al(H₂O)₂(OH)₄]^-

Which is Lewis base?

1. HCl               

2. HNO₃

3. HF               

4. NH₃

The molecule that is least likely to act as a Lewis base is:     

1. CO         

2. \(F^{-}\)         

3. AlCl₃      

4. PF₃

The increasing order of basic strength of Cl^-, ${\mathrm{CO}}_3^{2-}$, CH₃COO^-, OH^-, F^- is:

1. Cl^-<F^-<CH₃COO^-<${\mathrm{CO}}_3^{2-}$<OH^-

2.  Cl^-<F^-< ${\mathrm{CO}}_3^{2-}$<CH₃COO^-<OH^-

3. CH₃COO^-<Cl^-<F^-<${\mathrm{CO}}_3^{2-}$<OH^-

4. none of the above

Which is not an acid salt?

1. NaH₂PO₂                                   

2. NaH₂PO₃

3. NaH₂PO₄                                   

4.  NaHSO₃

The pK_a for acid A is greater than pK_a for acid B. The strong acid is:

1. Acid A                                           

2. Acid B

3. Are equally strong                         

4. None of the above

Which equilibrium can be described as Lewis acid-base reaction but not Bronsted acid-base reaction?

1. H₂O + CH₃COOH$\rightleftharpoons$H₃O⁺ + CH₃COO^-

2. 2NH₃ + H₂SO₄ $\rightleftharpoons$$2{\mathrm{NH}}_4^{+}$ + ${\mathrm{SO}}_4^{2-}$

3. NH₃ + CH₃COOH $\rightleftharpoons$${\mathrm{NH}}_4^{+}$ + CH₃COO^-

4. [Cu(H₂O)₄]²⁺ + 4NH₃ $\rightleftharpoons$ [Cu(NH₃)₄]²⁺ + 4H₂O