The correct statement (s) regarding the binary transition metal carbonyl compounds is (are) (Atomic numbers: Fe = 26, Ni = 28)A. Total number of valence shell electrons at metal centre in `Fe(CO)_(5)` or `Ni(CO)_(4)` is 16B. These are predominantly low spin in natureC. Metal-carbon bond strengthens when the oxidationary state of the metal is loweredD. The carbonyl C-O bond weakens when the oxidation state of the metal is increased .

The correct statement (s) regarding the binary transition metal carbon

1.	The correct statement (s) regarding the binary transition metal carbonyl compounds is (are) (Atomic numbers: Fe = 26, Ni = 28)A. Total number of valence shell electrons at metal centre in `Fe(CO)_(5)` or `Ni(CO)_(4)` is 16B. These are predominantly low spin in natureC. Metal-carbon bond strengthens when the oxidationary state of the metal is loweredD. The carbonyl C-O bond weakens when the oxidation state of the metal is increased .
Answer» Correct Answer - b,c (b,c) Fe`(CO)_5` total no of valence electrons = 18 low spin complex ltBrgt `Ni(CO)_4` : Total no. Of valence electrons = 18 low spin complex, Metal-carbonyl(C-O) bond is stronger is case of increased oxidation state of metal.