Which of the following statement is incorrect?

Options

A. `Cr(CO)_(6)ltFe(CO)_(5)ltNi(CO)_(4)` (order of increasing CO bond strength)
B. `[V(CO_(6)]^(-)lt[Cr(CO)_(6)]lt[Mn(C)_(6)]^(+)` (order of increasing `M-C` bond strength where `M` is central metal atom/ion)
C. `[V (CO)_(6)]^(-)=[Cr(CO)_(6)]=[Mn(CO)_(6)]^(+)` (Effective atomic no)
D. `[V(CO)_(6)]^(-)lt[Cr(CO)_(6)]lt[Mn(CO)_(6)]^(+)` (Order of increasing `CO` and strength)

Answer

D

Explanation

`((Ni(CO)_(4)),(Fe(CO)_(5)),(Cr(CO)_(6)))darr` Extent of synergic boding `darr` `M-C` bond length `uarr` CO bond strength
`(([V(CO)_(6)]^(-)), ([Cr(CO)_(6)]), ([Mn(CO)_(6)]^(+)))uarr` Extent of synergic bonding `uarr` M-C bond strength `darr` CO bond strength