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Answers
Explanation:
a) In solution of tartaric acid , Blue litmus paper turns to red as it is a acid and in acids blue litmus paper changes to red .
In Soap solution , blue litmus paper remains unchanged as it is a base and in bases blue litmus paper have no effect .
Pure water is neutral to litmus which means that no change in the colour of blue or red litmus paper is observed when treated with water.
b) In solution of tartaric acid , Red litmus paper remains unchanged as it is a acid and in acids red litmus paper have no effect .
In Soap solution , Red litmus paper turns to Blue as it is a Base and in bases red litmus paper changes to blue .
Pure water is neutral to litmus which means that no change in the colour of blue or red litmus paper is observed when treated with water.
c) If few drops of Phenolphthalein solution is added to the solution of tartaric acid it turns to pink as Phenolphthalein solution chages to pink colour in acids .
If few drops of Phenolphthalein solution is added to Soap solution it remains colourless as Phenolphthalein solution has no effect on Bases.
In pure water also Phenolphthalein has no effect .
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