Chemistry-
General
Easy
Question
Assertion :The first ionisation energy of Be is greater than boron [AIIMS 2002]
Reason : 2p orbitals have lower energy than 2s orbitals.
- If both assertion and reason are true and the reason is the correct explanation of the assertion.
- If both assertion and reason are true but reason is not the correct explanation of the assertion.
- If assertion is true but reason is false.
- If the assertion and reason both are false.
The correct answer is: If both assertion and reason are true and the reason is the correct explanation of the assertion.
The first ionization 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 have lower energy than 2 s-orbitals. Both assertion and reason are true and reason is correct explanation.
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