Assertion: The first ionisation energy of `Be` is greater than that of `B`.
Reason: 2p-orbital is lower in energy than 2s-orbital.

Options

A. Both Statement I and Statement II are correct, Statement II is the correct explanation of Statement I
B. Both Statement I and Statement II are correct, Statement II is not the correct explanation of Statement I
C. Statement I is correct, Statement II is the incorrect
D. Statement I is incorrect, Statement II is the correct

Answer

C

Explanation

Assertion is correct `Be(1s^(2),2s^(2))` has stable electronic configuration, removing an electron require more energy than the same for `B(2p^(1))`. Reason is incorrect (Aufbau principle).