What is the pH of a 10⁻⁸ M solution of HCl in water?

1. -8

2. 8

3. between 6 and 7

4. between 7 and 8

Find the pair of solutions that can be mixed to prepare an acidic buffer.

1. Sodium chloride and sodium hydroxide

2. Sulphuric acid and sodium sulphate

3. Ammonium chloride and ammonium nitrate

4. Ammonium acetate and acetic acid

Identify the factor on which the equilibrium constant (Kp) for the reaction
H₂(g) + I₂(g) ⇌ 2HI(g) depends:

1. Catalyst

2. Temperature

3. Total pressure

4. The amounts of H₂ and I₂ present

The best indicator for detection of end point in titration of a weak acid and strong base is

1. methyl red (5 to 6)

2. methyl orange (3 to 4)

3. phenolphthalein (8 to 9.6)

4. bromothymol blue (6 to 7.5)

Which among the following is the conjugate acid of NH₂^-?

1. ${\mathrm{NH}}_4^{+}$

2. ${\mathrm{NH}}_3$

3. ${\mathrm{NH}}_2\mathrm{OH}$

4. ${\mathrm{N}}_2{\mathrm{H}}_4$

The pH of the neutralization point of 0.1 N ammonium hydroxide with 0.1 N HCl is

1. 1

2. 6

3. 9

4. 7

Find the compound whose 0.1 M aqueous solution is basic.

Fear or excitement, generally causes one to breathe rapidly and it results in the decrease of CO₂ concentration in blood. In what way will it change the pH of blood?

1. pH will increase

2. pH will decrease

3. no change

4. pH will adjust to 7

Which of the following combinations can be used to prepare a buffer solution?

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