Assertion: pure iron when heated in dry air is converted with a l… - Vidyadip

MCQ

Assertion: pure iron when heated in dry air is converted with a layer of rust.
Reason: Rust has the composition$Fe _3 O _4$

A
if both assertion and reason are true and reason is the correct explanation of assertion.
B
if both assertion and reason are true but reason is not the correct explanation of assertion.
C
assertion is true but reason is false.
✓
both assertion and reason are false.

✓

Answer

Correct option: D.

both assertion and reason are false.

both assertion and reason are false.
Explanation:
Both are false
1. Dry air has no reaction with iron
2. Rust has the composition $Fe _2 O _3 \cdot xH _2 O$

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