5 cm3 dilute sodium hydroxide solution and 5 cm3 one percent copper sulphate solution are...

JAMB 1992

5 cm³ dilute sodium hydroxide solution and 5 cm³ one percent copper sulphate solution are added to a solution of food specimen. The purple colour which is observed shows the presence of

A. glucose
B. starch
C. fat
D. protein

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Correct Answer: Option D

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