The conjugate bases for Brönsted acids, H₂SO₄, and HCO₃^- will be, respectively:

1. ${\mathrm{HSO}}_4^{-}$, ${\mathrm{CO}}_3^{2-}$

2.  HSO₄^-, CO₃^-

3. SO₄^-2, CO₃^2-

4. HS₂O₄^-, CO₃^2-

The conjugate acids for the Brönsted bases  ${\mathrm{NH}}_2^{-}$ , NH₃ and HCOO^– will be respectively:

1. N₂H₆, NH⁴⁺, HCOOH

2. NH₃, ${\mathrm{NH}}_4^{+}$ , HCOOH

3. NH₃, NH⁴⁺, HCOO₃

4. N₂H, NH⁴⁺, HCOOH

OH^– , F^– , H⁺ and BCl₃

The ionization constants of HCOOH, and HCN at 298K are 1.8 × 10^–4 and 4.8 × 10^–9 respectively. The ionization constants of the corresponding conjugate bases of HCOOH and HCN will be

The ionization constant of phenol is 1.0 × 10^–10. The concentration of phenolate ion in 0.05 M solution of phenol will be:

The first ionization constant of H₂S is 9.1 × 10^–8. The concentration of HS^– ion in its 0.1 M solution will be:

The ionization constant of acetic acid is 1.74 × 10^–5. The pH of acetic acid in its 0.05 M solution will be:
1. 7.81

(a) Human muscle-fluid,  pH = 6.83 

(b) Human stomach fluid, pH = 1.2

(c) Human blood, pH = 7.38           

(d) Human saliva, pH = 6.4.

The pH values of milk, tomato juice, lemon juice, and egg are 6.8, 4.2, 2.2, and 7.8 respectively.

The corresponding hydrogen ion concentration is maximum in: 

The ionization constant of propanoic acid is 1.32 × 10^–5. The degree of ionization of 0.05M acid solution will be:

1. $\mathrm{\alpha }$ = 0.63 × 10^–2

2. $\mathrm{\alpha }$ = 1.63 × 10^–4

3. $\mathrm{\alpha }$ = 1.63 × 10^–2

4. $\mathrm{\alpha }$ = 0.05 × 10^–2