Chemistry · 2021
JEE Main · 16 March 2021, Shift 1 · Q38
Given below are two statement: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: Size of Bk^3+ ion is less than…
Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R :Assertion A : Size of $\displaystyle \mathrm{Bk}^{3+}$ ion is less than $\displaystyle \mathrm{Np}^{3+}$ ion.
Reason R : The above is a consequence of the lanthanoid contraction.
In the light of the above statements, choose the correct answer from the options given below:
Official answer
(3)
$\displaystyle \mathbf{A}$ is true but $\displaystyle \mathbf{R}$ is false
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JEE Main 2021 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.