Question

Assertion : Metal deficiency defect can be seen in $FeO$.
Reason : $Li$ compound (LiCl) has pink colour due to F-center.

• 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: (B)

In the crystal of FeO, some Fe²⁺ ions are missing and the loss of positive charge is made up by the presence of the required number of Fe³⁺ ions. This however causes metal deficiency in the crystal.