P-Block Elements Ques 571
Question: In nitroprusside ion, the iron and NO exist as $ F{{e}^{2+}} $ and $ N{{O}^{+}} $ rather than $ F{{e}^{3+}} $ and NO. These forms can be differentiated by
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 nitroprusside ion is $ {{[Fe{{(CN)}_6}N{{O}^{+}}]}^{2-}} $ The magnetic moment measurements reveal the presence of 4 unpaired electrons in Fe which must be then in $ F{{e}^{2+}}( 3d^{6} ) $ and not $ F{{e}^{3+}}( 3d^{5} ) $
