1.

Assertion (A) : Zinc oxide is colourless at room temperature but on heating it becomes yellow in colour. Reason (R) : On heating Zinc loses oxygen and thereby forming free Zn^(2+) ions. The excess Zn^(2+) ions move to interstitial sites and the electrons also occupy interstitial positions.

Answer»

Both A and R are CORRECT and R is the correct EXPLANATION of A.
Both A and R are correct but R is not the correct explanation of A
A is correct but R is WRONG
A is wrong but R is correct

SOLUTION :Both A and R are correct and R is the correct explanation of A.


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