Statement I: Glucose gives a reddish-brown precipitate with Fehling's solution.
Statement I: Reaction of glucose with Fehling's solution gives CuO and gluconic acid. (IIT-JEE, 2007)
A
Statement I is true; Statement II is true; Statement II is the correct explanation of Statement I.
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B
Statement I is true; Statement II is true; Statement II is not the correct explanation of Statement I.
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C
Statement I is true; Statement II is false
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D
Statement I is false; Statement II is true
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Solution
The correct option is C Statement I is true; Statement II is false Statement I is true but Statement II is false because Cu2+ of Fehling's solution, [Cu(NH3)4]2+(OH)2, is reduced Cu+ to give a red precpitate of Cu2O. OCH(CHOH)4CH2OH+Cu2++⊖OH→⊖OOC−(CHOH)4CH2OH(gluconicacid)+Cu2O+H2O