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Question
An aqueous solution turns red litmus solution blue. Excess addition of which of the following solutions would reverse the change?
Options
Baking powder
Lime
Ammonium hydroxide solution
Hydrochloric acid
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Solution
Hydrochloric acid
Explanation -
The aqueous solution is of basic nature since red litmus changes to blue. The reaction can be reversed (acidic solution) by adding excess of hydrochloric acid.
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