Acidified potassium permanganate solution oxidises oxalic acid. The spin-only magnetic moment of the mangenese product formed from the above reaction is B.M.___(Nearest Integer)

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2 KMnO 4 + 5 H 2 C 2 O 4 + 3 H 2 SO 4 → K 2 SO 4 + 2 MnSO 4 + 10 CO 2 + 8 H 2 O In acidic medium, Mn 7 + gets reduced to Mn 2 + Mn (II) = Ar 3 d 5 Number of unpaired electron in Mn 2 + = 5 μ = n n + 2 B . M μ = 5 5 + 2 B . M μ = 5 . 9 B . M

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