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Class 12 NEET Chemistry D And F Block Elements Questions

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Question : 11

Total: 108

Given below are two statements : one is labelled as
Assertion (A) and the other is labelled as Reason (R).
Assertion (A) :- Ionisation enthalpies of early actinoids are lower than for early lanthanoids.
Reason (R) : Electrons are entering 5f orbitals in actinoids which experience greater shielding from nuclear charge.
In the light of the above statements, choose the correct answer from the options given below :

[NEET 2023 mpr]

(A) is true but (R) is false.
(A) is false but (R) is true
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true but (R) is not the correct explanation of (A).

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