Consider the following four statements and pick the correct list of statements form the options
(I) Both Chromium (II) ion and Manganese (III) ion have the same ground state electronic configuration in isolated gaseous ions
(II) Chromium (II) is a reducing agent and Manganese (III) ion is an oxidizing agent in water
(III) Chromium (II) is an oxidizing agent and Manganese (III) ion is a reducing agent in water
(IV) Both Chromium (0) and manganese(0) are paramagnetic in nature

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I, IV

I, III, IV

I, II, IV

I, II

answer is A.

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Detailed Solution

Manganese electronic configuration being 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵. The five unpaired electrons in the 3d orbital result in a nonzero net magnetic moment, making manganese paramagnetic.

In the case of chromium (Cr), it has 24 electrons with an electron configuration of 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵. This configuration leaves six unpaired electrons in the 3d orbital, making it paramagnetic.

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