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Assertion: The first ionisation energy o...

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

A

Statement I is true: Statement II is true, Statement II is the correct explanation of Statement I.

B

Statement I is true, Statement II is true, Statement II is not the correct explanation of Statement I.

C

Statement I is true, Statement II is false.

D

Statement I is false, Statement II is true.

Text Solution

Verified by Experts

The correct Answer is:
C
Statement I is true Be has higher first ionisation energy than `B` which is against periodic trend.
Statement II is false `2s`- orbital is lower in energy than `2p`, Aufbau's principle.
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