Question

How many of the following are diamagnetic species?

I. K₃[Fe(F₆)] 

II. K₄[Fe(CN₆)] 

III. K₃[Cu(CN)₄] 

IV. K₂[Cu(CN)₄]

Answer 1

Correct answer is 2.00

K₄[Fe(CN₆)] is diamagnetic 

K₃[Cu(CN)₄] is diamagnetic 

K₂[Cu(CN)₄] is paramagnetic as it has one unpaired electron 

K₃[Fe(F₆)] is paramagnetic as it has 5 unpaired electrons.

Therefore, only 2 compounds K₄[Fe(CN₆)] and K₃[Cu(CN)₄] are diamagnetic