pH

Q.

Is the $\mathrm{pH}$ Scale Logarithmic?

Q. What is an indicator? Give two examples. (2 marks)

Q.

How does the pH Scale Measure Acidity?

Q.

Assertion: pH of an aqueous solution decreases from 4 to 2.

Reason: The acidic character of the solution increases.

1. Both assertion and reason are correct and the reason is the correct explanation of the assertion.

2. Both assertion and reason are correct but the reason is not the correct explanation of the assertion.

3. The assertion is correct but the reason is incorrect

4. The assertion is incorrect but the reason is correct

Q.

Explain the term pH.

Q.

Q. pH of 0.01 M ammonium cyanide solution is 7.02. If 5 litres of water is added to this solution, the pH becomes -

1. $<$ 7.02
2. 7.02
3. Can't be predicted
4. $>$ 7.02

Q.

Choose the correct option:

1. Between pH of 1 to 7: As pH increases, acidic nature increases

2. No change in the pH

3. Between pH of 7 to 14: As pH increase, basic nature increases

4. Between pH of 7 to 14: As pH increases, acidic nature increases

Q.

A compound X consists of only molecules. Hence X will have

1. A crystalline hard structure

2. A low melting and boiling points

3. A strong force of attraction between its molecules

4. An ionic bond