NEET Solved Paper 2016 Question 29

Question: Which of the following has longest C-O bond length? (Free C-O bond length in Co is $ 1.128\overset{o}{\mathop{A}}, $ ).

Note:- Since metal atom is carrying maximum -ve charge therefore it would show maximum synergic bonding as sa resultant C-O bond length would be maximum.

Options:

A) $ Ni{{(CO)}_4} $

B) $ {{[Co{{(CO)}_4}]}^{O-}} $

C) $ {{[Fe{{(CO)}_4}]}^{2-}} $

D) $ {{[Mn{{(CO)}_6}]}^{+}} $

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Answer:

Correct Answer: C

Solution:

  • $ {{[Fe{{(CO)} _4}]}^{2-}} $