JEE Main Chemistry question

**Assertion:** Buffer system of carbonic acid and sodium bicarbonate is used for the precipitation of hydroxides of third group elements. **Reason:** It maintains the pH to a constant value, about 7.4.

(A)Assertion is True, Reason is True; Reason is correct explanation for Assertion
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is TrueCorrect

Answer: (D)

Solution

The Assertion is actually **false** — the carbonic acid/bicarbonate buffer is physiologically important for maintaining blood pH, but precipitation of third-group hydroxides (in qualitative inorganic

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Question ID VK-135964