A) Material X contains proteins.
B) Material X contains carbohydrates.
C) Material X contains fats.
D) Material X contains iodine.
Correct Answer: A
Solution :
When we take raw egg white in a test tube and add copper sulphate solution and caustic soda to it, then after shaking, the solution in the test tube turns violet in colour. This experiment is done to test the presence of proteins in food items.
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