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प्रश्न
A solution has a pH of 7. Explain, how you would:
Increase its pH, If a solution changes the color of litmus from red to blue, what can you say about its pH?
उत्तर
pH of a solution having pH 7 can be increased by adding a base to it such as NaOH.
If a solution changes colour of litmus from red to blue, it shows that its pH is above 7.
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