IIT-JEE 2007 · Paper 2 · Chemistry Q33

ChemistryAssertion and reason+3 / -1Question 33 of 66

STATEMENT-1: Glucose gives a reddish-brown precipitate with Fehling's solution.

because

STATEMENT-2: Reaction of glucose with Fehling's solution gives CuO and gluconic acid.

Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1

Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1

Statement-1 is True, Statement-2 is False

Statement-1 is False, Statement-2 is True

Answer and worked solution

Official answer: C

Statement 1. Glucose, an aldose, reduces Fehling's solution and a reddish-brown precipitate forms. True.

Statement 2. The precipitate is copper(I) oxide, $\ce{Cu2O}$ , not CuO (the glucose is oxidised to gluconic acid). False.

(C)

Topics:Carbohydrates Oxidation and reduction

IIT-JEE 2007 · Paper 2, Chemistry question 33