Which of the following compounds are used to test the presence of proteins?

Copper sulphate

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Potassium chloride

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Iodine solution

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Caustic soda

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Solution

The correct options are
A Copper sulphate
D Caustic soda
$∙$ Copper sulphate and sodium hydroxide solution are used to test the presence of protein in food.
$∙$ Food sample to be tested is converted into a powder or paste form. To this water is added.
$∙$ Take 10 drops of this solution into a test tube. Add 2 drops of copper sulphate solution and 10 drops of sodium hydroxide (caustic soda) solution and mix well.
$∙$ Formation of purple or violet colour confirms the presence of protein in the sample.

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Similar questions

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?

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