MHT CET Chemistry question

Among the following, the lowest degree of paramagnetism per mole of the compound at 298 K will be shown by

Answer: (B)

Solution

Unpaired electrons of the metal ions: Mn2+ (d5) = 5, Cu2+ (d9) = 1, Fe2+ (d6) = 4, Ni2+ (d8) = 2; the

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Question ID VK-074313