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In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A): A solution containing a mixture of acetic acid and sodium acetate maintains a constant value of pH on addition of small amounts of acid or alkali.

Reason (R): A solution containing a mixture of acetic acid and sodium acetate acts as a buffer solution around pH 4.75.

(i) Both A and R are true, and R is the correct explanation of A.

(ii) Both A and R are true, but R is not the correct explanation of A.

 (iii) A is true, but R is false.

(iii) Both A and R are false.

 

Answers (1)

The answer is the option (i) Both A and R are true, and R is the correct explanation of A.

Explanation: Buffer solutions are such solutions which resist a change in their pH on dilution or with the addition of small amounts of acid or alkali.

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