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NEET ChemistryMedium

Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?

1

SCN−<F−<C2O42−<CN−SCN^- < F^- < C_2O_4^{2-} < CN^-

2

SCN−<F−<CN−<C2O42−SCN^- < F^- < CN^- < C_2O_4^{2-}

3

F−<SCN−<C2O42−<CN−F^- < SCN^- < C_2O_4^{2-} < CN^-

4

CN−<C2O42−<SCN−<F−CN^- < C_2O_4^{2-} < SCN^- < F^-

Step-by-Step Solution

According to the spectrochemical series, the order of increasing field strength is I−<Br−<SCN−<Cl−<S2−<F−<OH−<C2O42−<H2O<NCS−<EDTA4−<NH3<en<CN−<COI^- < Br^- < SCN^- < Cl^- < S^2- < F^- < OH^- < C_2O_4^{2-} < H_2O < NCS^- < EDTA^{4-} < NH_3 < en < CN^- < CO. Thus, SCN−<F−<C2O42−<CN−SCN^- < F^- < C_2O_4^{2-} < CN^- is correct.

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