Glucose reduces Fehling's solution to:

copper

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black cupric oxide

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reddish brown cuprous oxide

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mixture of copper and cupric oxide

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Solution

The correct option is C reddish brown cuprous oxide
$C H_{2} O H (C H O H)_{4} C H O G l u c o s e + 2 C u O ⟶ C H_{2} O H (C H O H)_{4} C O O H G l u c o n i c a c i d + C u_{2} O (r e d . p p t .)$

Glucose reduces Fehling's solution to reddish brown cuprous oxide. Fehling's solution is an aqueous solution of copper sulfate, sodium hydroxide, and potassium sodium tartrate, used to test for the presence of sugars and aldehydes in a substance.

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