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NEET 2020
Exam
NEET
Year
2020
Subject
Chemistry
Chapter
Coordination Compounds

NEET 2020 · Chemistry · Coordination Compounds

Which of the following is the correct order of increasing field...

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

Options

  1. ASCN−<F−<CN−<C2O42−{SCN}^{-} < {F}^{-} < {CN}^{-} < {C}_{2}{O}_{4}^{2 -}
  2. BF−<SCN−<C2O42−<CN−{F}^{-} < {SCN}^{-} < {C}_{2}{O}_{4}^{2 -} < {CN}^{-}
  3. CCN−<C2O42−<SCN−<F−{CN}^{-} < {C}_{2}{O}_{4}^{2 -} < {SCN}^{-} < {F}^{-}
  4. DSCN−<F−<C2O42−<CN−{SCN}^{-} < {F}^{-} < {C}_{2}{O}_{4}^{2 -} < {CN}^{-}

Correct answer

D. SCN−<F−<C2O42−<CN−{SCN}^{-} < {F}^{-} < {C}_{2}{O}_{4}^{2 -} < {CN}^{-}

Step-by-step solution

I−<Br−<S2−<SCN−(S− bonded )<Cl−<NO3−<N3−<F−<OH−<C2O42−<H2O<NCS−(N− bonded )<CH3CN< py (pyridine) <NH3< en (ethylenediamine) < bipy (2,2′-bipyridine) < phen (1,10-phenanthroline) <NO2−(N-bonded) <PPh3 (Triphenylphosphine) <CN−<CO\begin{aligned} & \mathrm{I}^{-}<\mathrm{Br}^{-}<\mathrm{S}^{2-}<\mathrm{SCN}^{-}(\mathrm{S}-\text{ bonded })<\mathrm{Cl}^{-}<\mathrm{NO}_3^{-}<\mathrm{N}_3^{-}<\mathrm{F}^{-}<\mathrm{OH}^{-}<\mathrm{C}_2 \mathrm{O}_4{ }^{2-}<\mathrm{H}_2 \mathrm{O}<\mathrm{NCS}^{-}(\mathrm{N}-\text{ bonded })< \\ & \mathrm{CH}_3 \mathrm{CN}<\text{ py (pyridine) }<\mathrm{NH}_3<\text{ en (ethylenediamine) }<\text{ bipy }\left(2,2^{\prime} \text{-bipyridine) }<\text{ phen (1,10-phenanthroline) }\right. \\ & <\mathrm{NO}_2^{-}\left(\mathrm{N} \text{-bonded) }<\mathrm{PPh}_3 \text{ (Triphenylphosphine) }<\mathrm{CN}^{-}<\mathrm{CO}\right.\end{aligned})$
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