JEE Main · 2023 · 08 Apr 2023 · Shift 1 · d and f Block Elements

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In chromyl chloride, the number of d-electrons present on chromium is same as in (Given at no. of Ti: 22, V: 23, Cr: 24, Mn: 25, Fe: 26)

(A)Ti (III)
(B)Fe (III)
(C)V (IV)
(D)Mn (VII)✓ Correct

Answer: (D)

Solution

In chromyl chloride (CrO₂Cl₂), chromium is in the +6 oxidation state. Cr(VI) has the electronic configuration [Ar]¹⁸ 3d⁰, meaning zero d-electrons. Among the given options, only Mn(VII) also has the configuration [Ar]¹⁸ 3d⁰. The other options have: Fe(III) = [Ar]¹⁸ 3d⁵, Ti(III) = [Ar]¹⁸ 3d¹, and V(IV) = [Ar]¹⁸ 3d¹. Therefore, Cr(VI) and Mn(VII) both have the same d⁰ configuration.

JEE Main · 2023 · 08 Apr 2023 · Shift 1 · Single correct option

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