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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2016
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Q)

Which of the following has longest $C – O$ bond length ? (Free $C – O$ bond length in $CO$ is $1.128 Å$)


( A ) $[Fe(CO)_4]^{2-}$
( B ) $[Co(CO)_4]^{\Theta}$
( C ) $[Mn(CO)_6]^+$
( D ) $Ni(CO)_4$

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