Question

Which of the following solution will turn phenolphthlein pink

(A) HCL
(B) CO2
(C) KOH
(D)H2SO4

Answer 1

Answer:

HCL, will turn phenolphthlein pink

Answer 2

Answer:

The correct answer is option (C) KOH.

Explanation:

Initially, phenolphthalein is colourless. It does not react with acid, hence it is colourless when exposed to acid. And it turns pink as it reacts with strong bases like NaOH, KOH, etc.

• It turns colourless in acidic solutions and pink in basic solutions for this application.
• An artificial indicator called phenolphthalein is employed in acid-base titrations. Any acidic or neutral solution to which it is introduced will become colourless.
• When phenolphthalein is added to a basic solution, phenolphthalein ions develop, turning the solution pink.
• Being a base, KOH will turn pink when phenolphthalein is added to its solution.
• The other solutions, on the other hand, are all acidic and will become colourless when phenolphthalein is added because of this.

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