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Question
A solution has a pH of 7. Explain, how you would:
Decrease its pH, If a solution changes the color of litmus from red to blue, what can you say about its pH?
One Line Answer
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Solution
pH can be decreased by adding an acid such as HCl to it.
If a solution changes colour of litmus from red to blue, it shows that its pH is above 7.
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Chapter 3: Study of Acids, Bases and Salts - Questions from ICSE Examinations [Page 70]
