Assertion: Zinc becomes dull in moist air.
Reason: Zinc is coated by a thin film of its basic carbonate in moist air.

Dear Student

Correct option is (A)

Zinc gets covered with carbonate layer and its surface becomes dull.

4 Zn + 3 H2O + 2O2 + 2CO2 --> ZnCO3.3Zn(OH)2.

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Ans. A
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