The correct match among the following is/are-

Acid	Conjugate Base
a. HF	H2F-
b. H2SO4	HSO4-
c. \(HCO_{3}^{-}\)	\(CO_{3}^{2-}\)

1. a, c
2. a, b
3. b, c
4. Only c is correct

The correct match among the following is/are-

1. a, c
2. a, b
3. b, c
4. Only c is correct

The incorrect match among the following  is:

a. HO^– = Lewis base
b. F^– = Lewis base
c. H⁺ = Lewis acid
d. BCl₃ = Lewis base

1. Both a and b
2. Only b
3. Only d
4. Both a and d

The concentration of hydrogen ions in a sample of soft drink is 3.8 × 10^–3M. The pH of soft drink is-
(Given: log 3.8 = 0.58)

1. 1.45
2. 2.42
3. 3.76
4. 2.79

The ionization constant of HF is 3.2 × 10^–4 and its solution concentration is 0.02 M. The  pH of the solution is-

1. 3.45
2. 2.62
3. 4.21
4.  1.89
 

The pH of 0.1M monobasic acid is 4.50. The value of pK_a of the monobasic acid is-

1. 6. 3
2. 7.4
3. 8.0
4. 9.0

The ionization constant of the hypochlorous acid is 2.5 × 10^–5. The concentration of hypochlorous acid 0.08 M. The percent dissociation of HOCl is-

1. 2.56 %
2. 1.21 %
3. 1. 76 %
4. 2.21 %

The pH of 0.004M hydrazine solution is 9.7, its ionization constant K_b and pK_b are respectively-

1.  K_b = 8.96 × 10^–7; pK_b = 6.04
2. K_{b =} 7.26 × 10^–7 ; pK_b = 6.04
3. K_b = 8.96 × 10^–7 ; pK_b = 7.02
4. K_{b =} 7.26 × 10^–7 ; pK_b = 7.02

The pH of the solution in which 0.2M NH₄Cl and 0.1M NH₃ are present is:
(pK_b of ammonia solution is 4.75)

1. 12
2. 9
3. 6
4. 11

The ionization constant of ammonia is 1.77 × 10^–5. The pH of a 0.05M of ammonia solution is-

1. 12
2. 11
3. 10
4. 6