Please tell


Dear student,
The answer to the question is (C) the colour of the food sample changed to violet.The procedure of the test shows that it is used to detect protein in a sample. The use of copper sulphate and caustic soda will turn the sample containing protein into violet colour.This observation will bring Aman to the conclusion that the specific nutrient is present in the food sample X.

Hope this will clear all your doubts about the topic.

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