Caustic soda and ________________ are used to test the presence of the proteins in food.

iodine

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copper sulphate

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water

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hydrochloric acid

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Solution

The correct option is B copper sulphate

The presence of protein is detected by the biuret test.

Caustic soda and copper sulphate are reagents used in biuret test to detect the presence of proteins in a food sample.

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Similar questions

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

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

Given below are the steps to test the presence of proteins in a food item.

(i) Take a small quantity of the food item in a test tube, add 10 drops of water to it and shake it.

(ii) Make a paste or powder of food to be tested.

(iii) Add 10 drops of caustic soda solution to the test tube and shake well.

(iv) Add 2 drops of copper sulphate solution to it.

Which of the following is the correct sequence of steps?

(a) i, ii, iv, iii

(b) ii, i, iv, iii

(d) iv, ii, i, iii

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