D-And F-Block Elements Ques 254

Question: In nitroprusside ion, the iron and $ NO $ exist as $ Fe^{II} $ and $ N{{O}^{+}} $ rather than $ Fe^{III} $ and $ NO $ . These forms can be differentiated by

[IIT-JEE 1998]

Options:

A) Estimating the concentration of iron

B) Measuring the concentration of $ C{{N}^{-}} $

C) Measuring the solid state magnetic moment

D) Thermally decomposing the compound

Show Answer

Answer:

Correct Answer: C

Solution:

The existence of $ F{{e}^{2+}} $ and $ N{{O}^{+}} $ in Ntroprusside ion $ {{[Fe{{(CN)}_5}NO]}^{2-}} $ can be established by measuring the magnetic moment of the solid compound which should correspond to $ (F{{e}^{2+}}=3d^{6}) $ four unpaired electrons.



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