Question:
Which of the following will turn phenolphthalein pink?
CH$_3$COOH
Ca(OH)$_2$
HCl
NaOH
Which of the following will turn phenolphthalein pink?
CH$_3$COOH
Ca(OH)$_2$
HCl
NaOH
CH$_3$COOH
Ca(OH)$_2$
HCl
NaOH
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Phenolphthalein is colorless in acid but turns pink in base.
Updated On: Jul 17, 2025
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Solution and Explanation
Phenolphthalein turns pink in basic solutions. Both Ca(OH)$_2$ and NaOH are bases.
Correct options: (2) and (4) — Calcium hydroxide and Sodium hydroxide.
Correct options: (2) and (4) — Calcium hydroxide and Sodium hydroxide.
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