The albumin (white part) of egg gives purple/violet colour with the solution of copper sulfate and caustic soda. This shows that ________ is present in it.

Carbohydrate

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Protein

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Vitamin

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Fats

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Solution

The correct option is B
Protein

If a food gives purple or violet colour with the solution of copper sulphate and caustic soda, we can say that protein is present in it. The solution of copper sulphate and caustic soda is called 'biuret solution' and is blue in colour and it turns to violet or purple colour upon reacting with proteins.

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