take 3 test tube (1,2,3). contain china rose solution that was pink in colour on addition of 2 drops of solution A to the test tube 1 dark pink colour appears when 2 drops of a solutikn B added to the test tube 2 the colour turns green on addition 2 drops of solution C to the test tube 3 there is no change of colur why do you think these change s in colur happen .
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because first solution contains acid, second solution contains base and the third solution was neutral
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