Question

To solution A, phenolphthalein solution is added in a test tube. The solution turns pink
.On adding of dilute HCl slowly, the pink colour disappears. Give reason for this observation. On
addition of little more solution A to the test tube, the pink colour reappears. What is the nature
of solution A?

Answer 1

Hello !
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Phenolphthalein is a Acid - base indicator .
It gives pink color in base solutions but no change in acid solutions
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SO the solution A is base 
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