1.

Assertion (A): Atomic radii from Cr to Cu is almost similar Reason (R ): Sheilding effect of entering electron in 3d-orbital decrease repulsion forces of 4s-orbital electrons towards nucleus

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(A) and (R ) both are true (R ) is CORRECT EXPLANATION of (A)
(A) is true, (R ) is wrong
(A) and (R ) both are true
(A) is wrong (R ) is true

Answer :B


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