In which of the following reagent Cupric citrate complex is formed?
Correct answer: B. Benedict's solution test
- A. Fehling's solution test
- B. Benedict's solution test
- C. Silver mirror test
- D. Sodium nitroprusside test
Explanation
The Benedict's solution test is also used to test for the presence of reducing sugars. Benedict's solution is an alkaline solution containing a cupric. When a reducing sugar is added to Benedict's solution, the copper(II) ions are reduced to copper(I) ions, which form a brick-red precipitate of cuprous oxide. Cupric citrate is also formed during Benedict's solution test.
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About Aldehydes and Ketones
Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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