Sodium hydroxide and copper sulphate are used to test the presence of in the food.
A
fat
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B
protein
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C
carbohydrate
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Solution
The correct option is B protein Protein is one of the essential food components which helps in the growth and maintenance of the body. A mixture of 2% copper sulphate solution and 10% sodium hydroxide solution is used to test protein in the food sample. Formation of purple or violet colour confirms the presence of protein in the sample. This test is also called as "Biuret Test".