When we add a few drops of copper sulphate caustic soda to the food it turns violet?

1. (A), (B), (D), (C)
2. ​(B), (A), (D), (C)
3. ​(B), (A), (C), (D)
4. ​(D), (B), (A), (C)

Answer

Video showing Test for Presence of Protein in Food

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

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