An aqueous solution turns phenolphthalein solution pink. When another aqueous solution is added to this pink solution, the pink colour disappears. Now when a few drops of the first solution are added to the reaction mixture, the mixture appears pink again. The respective changes in the nature of the solution are from :

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Acid-Base Indicators in Chemistry | PadhAiPro

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MCQ (Single)Acid-Base Indicators in ChemistryCBSE PYQ

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Select a pair of natural indicator from the following :

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You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?

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Acid-Base Indicators in Chemistry

Select from the following the statement which is true for bases.

MCQ (Single)Acid-Base Indicators in Chemistry

Assertion (A): Ammonium hydroxide is Weak Base Reason R: Phenolphthalein becomes pink in NH₄OH

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Assertion (A): Ammonia solution is an alkali. Reason (R): Ammonia solution turns blue litmus paper red.

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Acid present in tomato is :

MCQ (Single)Acid-Base Indicators in Chemistry