Looking for classes? Ksquare Career Institute, Bengaluru →
Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?
A
$SCN^-<F^-<CN^-<C_2O_4^{2-}$
B
$F^-<SCN^-<C_2O_4^{2-}<CN^-$
C
$CN^-<C_2O_4^{2-}<SCN^-<F^-$
D
$SCN^-<F^-<C_2O_4^{2-}<CN^-$
Detailed Solution
Spectrochemical series (NCERT): $I^- < Br^- < SCN^- < Cl^- < S^{2-} < F^- < OH^- < C_2O_4^{2-} < H_2O < NCS^- < edta^{4-} < NH_3 < en < CN^- < CO$
So the increasing order of field strength is $SCN^- < F^- < C_2O_4^{2-} < CN^-$.