1.

Assertion: The first ionisation energy of `Be` is greater than that of `B`. Reason: 2p-orbital is lower in energy than 2s-orbital.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If the 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 assertion is false but reason is true.

Answer» Correct Answer - A
The first Ionisation energy of `Be` is greater than Boron because it is difficult to remove electron from `Be` in comparison to boron. It is also true that the `2p`-orbitals. Both assertion and reason are true and reason is correct explanation.


Discussion

No Comment Found

Related InterviewSolutions