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Which of the following statements are correct?
A) The $M^{3 +} / M^{2 +}$ Reduction potential for iron is greater than Manganese.
B) The higher oxidation states of first row d-block elements get stabilized by oxide ion.
C) Aqueous solution of Cr⁺² can liberate hydrogen from dilute acid.
D) Magnetic moment of V⁺² is observed between 4.4-5.2BM.

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A, B and D only

A, B only

B, C only

C, D only

answer is C.

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Detailed Solution

$The M^{3 +} / M^{2 +} reduction potential for iron is + 0.77 manganese is + 1.97$

$V^{+ 2} : 3 d^{3} 4 s^{0} : no . of unpaired e^{-} s = 3; μ = \sqrt{n (n + 2)} = \sqrt{3 (3 + 2)} = 3.87$

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