Question

What is the result of adding copper sulphate and sodium hydroxide to rice( in a paste form )? Will it turn violet? or will it stay blue?

Answer 1

Explanation:

The caustic soda solution or copper sulfate solution on mixing with the egg white will show nothing.

This test is done to check the protein in a food item, the mixture will turn violet in the presence of caustic soda.

However, the yellow portion of the egg is protein rich.

But in the experiment, there is only white which will show no result at all.

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