question_answer

(i) \[{{K}_{4}}[Fe{{(CN)}_{6}}]\] (ii) \[{{K}_{3}}[Cr{{(CN)}_{6}}]\](iii) \[{{K}_{3}}[Fe{{(CN)}_{6}}]\] (iv) \[{{K}_{2}}[Ni{{(CN)}_{4}}\] Choose the complex which is paramagnetic [Kerala CET 2005]

A) (i), (ii) and (iii)

B) (i), (iii)and (iv)

C) (i), (iii) and (iv)

D) (i), (ii) and (iv)

E) (ii) and (iv)

Correct Answer: C

Solution :

\[{{[Fe{{(CN)}_{6}}]}^{4-}}\] \[{{[CO{{(CN)}_{6}}]}^{3-}}\] \[{{[Ni{{(CN)}_{4}}]}^{2-}}\]