The common features among the species ` CN^- , CO ` and ` NO^+` are :

Options

A. Bond order three and isoelectronic
B. Bond order three and weak field ligands
C. Bond order two and pi acceptors
D. Isoelectronic and weak field ligands

Answer

A

Explanation

For bond order refer Number of electrons in `CN^(Theta), CO` and `NO^(o+)` are
`CN^(Theta) rArr 6 + 7 +1 =14`
`CO rArr 6 +8 =14`
`NO^(o+) hArr 7 +8 -1 = 14`
Hence are isoelectronic
Bond order of `CN^(Theta), CO` and `NO^(o+) =3` .