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Assertion (A) : When the transition elem...

Assertion (A) : When the transition element ionises, the `4s`-orbital electrons are removed before the `3d`-orbital electrons.
Reason (R ) : The energy of `3d`-orbital electrons is lower than that of `4s`-orbital electrons.

A

Assertion is true but the Reason is false

B

Assertion is false, Reason is true

C

Both Assertion and Reason are true and the Reason is a correct explanation of the Reason.

D

Both Assertion and Reason are true but Reason is not a correct explanation of the assertion.

Text Solution

Verified by Experts

The correct Answer is:
A
It is true that 4s electrons ionises before 3d-orbital electrons but the energy level of 3d-orbital electron is more than 4s-orbital electrons.
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