An element X reacts with water to from a solution which turns phe… - Vidyadip

MCQ

An element X reacts with water to from a solution which turns phenolphthalein indicator pink. The element X is most likely to be:

A
Sulphur
✓
Sodium
C
Carbon
D
Silicon

✓

Answer

Correct option: B.

Sodium

Explanation:
Phenolphthalein is an indicator used in acid-base titrations. It turns colorless in acidic solutions and pink in basic solutions. Sodium is a metal which reacts with water to form sodium hydroxide, which is a base. Hence, phenolphthalein turns the solution pink.

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