The pK_b of dimethylamine and pk_a of acetic acid are 3.27 and 4.77 respectively at T (K). The correct option for the pH of dimethylammonium acetate solution is:

1. 7.75

2. 6.25

3. 8.50

4. 5.50

Which of the following salt solutions is basic in nature?

1. Ammonium chloride

2. Ammonium sulphate

3. Ammonium nitrate

4. Sodium acetate

The ionization constant of ammonium hydroxide is 1.77 x 10^-5 at 298 K. Hydrolysis constant of ammonium Chloride is

1. 5.65 x 10^-10

2. 6.50 x 10^-12

3. 5.65 x 10^-13

4. 5.65 x 10^-12

A weak acid, HA, has a K_a of 1.00×10^-5. If 0.100 mole of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to :

1. 99.0%

2. 1%

3. 99.9%

4. 0.100%

The compound with the highest pH among the following is: -

1. CH₃COOK

2. Na₂CO₃

3. NH₄Cl

4. NaNO₃

The fertilizer which makes the soil acidic is:

1. ${\left(N{H}_4\right)}_{2}S{O}_4$

2.  Super phosphate of lime .

3. $C{H}_{3}COONa$

4. $Ca{\left(N{O}_3\right)}_2$