Assertion: ZnO becomes yellow when it is heated. Reason: Metal excess defect arises due to excess of Zn2+ ions which move to interstitial sites and the electron moves to neighbouring interstitial sites.

Question

Assertion: ZnO becomes yellow when it is heated. Reason: Metal excess defect arises due to excess of Zn2+ ions which move to interstitial sites and the electron moves to neighbouring interstitial sites. (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) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

Correct answer is (a) If both assertion and reason are true and reason is the correct explanation of assertion

Q. Assertion : ZnO becomes yellow when it is heated. Reason : Metal excess defect arises due to excess of Zn2+ ions which move to interstitial sites and the electron moves to neighbouring interstitial sites.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

Correct answer is (a) If both assertion and reason are true and reason is the correct explanation of assertion

Q. Assertion : $Z n O$ becomes yellow when it is heated.
Reason : Metal excess defect arises due to excess of $Z n^{2 +}$ ions which move to interstitial sites and the electron moves to neighbouring interstitial sites.