The presence of _________ is detected by addition of copper sulphate and caustic soda solutions?

Protein

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Fat

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Vitamin

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Carbohydrate

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Solution

The correct option is A
Protein

This is called the 'Biuret Test' and is a method to check for the presence of protiens in food. In protein is present, the colour of the food changes to violet.

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Similar questions

When copper sulphate and caustic soda are added to a food sample, a violet color indicates the presence of proteins in the food.

Q54) Consider the following statements

i) Iodine solution is used to test the presence of fat.

ii) Vitamins have no nutritive value, but provide protection against disease.

iii) Mixture of copper sulphate and caustic soda is used to test the presence of proteins.

Which of the above statements are true?

Benedict's solution is used to test the presence of
(a) carbohydrates
(b) proteins
(c) fats
(d) vitamins

C u (O H)_{2}

C u (O H)_{2}

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