pH and Its Importance

Q.

How does ionization affect pH?

Q.

To increase the pH value of a neutral solution, we should add

1. an acid

2. an acid salt

3. an alkali

4. a salt

Q.

P is an aqueous solution of acid and Q is an aqueous solution of base. When these two are diluted separately, then:

1. The pH of P and Q increases

2. The pH of P and Q decreases

3. The pH of P increases, and the pH of Q decreases

4. The pH of P decreases, and the pH of Q decreases till pH in each case is 7

Q.

If a solution X has a pH value of 2 and if another solution Y has a pH value of 1. Then compare the hydrogen ion concentration between them.

1. Solution Y has more hydrogen ion concetration.

2. Solution X has more hydrogen ion concetration

3. We cannot compare the hydrogen ion concentrations.

4. Both have same hydrogen ion concentration.

Q.

Noble metals can only be dissolved in

1. Conc.${HNO}_3$

2. Conc. HCl

3. Conc. $H_2{SO}_4$

4. Aqua-regia