AIIMS 2017 Chemistry Carbohydrates Assertion Reason Question
In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choice.
Assertion (A) Glucose gives reddish brown precipitate with Fehling solution.
Reason (R) Reaction of glucose with Fehling solution gives CuO and gluconic acid.
Both the statements are true and Reason is the correct explanation of Assertion.
Both the statements are true but Reason is not the correct explanation of Assertion.
Assertion is true but Reason is false.
Both the statements are false.
Correct Answer
Detailed Explanation
The assertion is true because glucose, a reducing sugar, reacts with Fehling's solution to produce a reddish-brown precipitate of Cu₂O, indicating the reduction of Cu²⁺ ions. However, the reason is false because the reaction of glucose with Fehling's solution does lead to the formation of gluconic acid (C₆H₁₂O₇) as an intermediate, contradicting the statement that it does not produce gluconic acid. Option A is incorrect because the reason does not correctly explain the assertion, while option B is incorrect as it claims both statements are true. Option D is incorrect since the assertion is indeed true.
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