. The solution of base turn phenolphthalein solution into


(a)          yellow.

(b)          pink.

(c)           orange.

(d)          colourless.

 

Best Answer

(b)

Explanation: Phenolphthalein is used as an indicator. The phenolphthalein molecule is colorless. However, the phenolphthalein ion is pink. When a base is added to the phenolphthalein, ionization as H+ ions is reduces that led to the pink colour in the solution.

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