Boojho, Paheli and their friend Golu were provided with a test tube each containing China rose solution which was pink in colour. Boojho added two drops of solution ‘A’ in his test tube and got dark pink colour. Paheli added 2 drops of solution ‘B’ to her test tube and got green colour. Golu added 2 drops of solution ‘C’ but could not get any change in colour. Suggest the possible cause for the variation in their results.



China rose indicator turns acidic solutions to dark pink (magenta) and basic solutions to green. Thus ‘A’ is an acidic solution and ‘B’ is a basic solution. No change in colour of solution ‘C’ indicates that ‘C’ is a neutral solution.

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