AIIMS2018ChemistrySolid State
Assertion : Metal deficiency defect can be seen in FeO . Reason : Li compound ( LiCl ) has pink colour due to F-center.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion.
- BIf both assertion and reason are true but reason is not the correct explanation of assertion.
- CIf assertion is true but reason is false.
- DIf both assertion and reason are false.
Correct answer
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
Step-by-step solution
In the crystal of FeO , some Fe ²⁺ ions are missing and the loss of positive charge is made up by the presence of the required number of Fe ³⁺ ions. This however causes metal deficiency in the crystal.