When a drop of an unknown solution X is placed on a strip of pH paper, – InterviewSolution

1.	When a drop of an unknown solution X is placed on a strip of pH paper, a deep blue colour is produced. This sample should be which one of the following?
Answer» When a drop of an unknown solution X is placed on a strip of pH paper, a deep blue colour is produced. This sample should be which one of the following?

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