Question

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R

Assertion (A) : $ZnO$ becomes yellow when it is heated.

Reason (R) : Metal excess defect arises due to excess of $Zn^{2+}$ ions which move to interstitial sites and the electron moves to neighbouring interstitial sites.

In the light of the above statements, choose the correct answer from the options given below

• 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

Answer 1

Answer: (A)

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

Answer 2

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

Assertion : $ZnO$ becomes yellow when it is heated. (Correct)

Reason : Metal excess defect arises due to excess of $Zn^{2+}$ ions which move to interstitial sites and the electron moves to neighbouring interstitial sites. (True and correct explanation)