JEE Main 2014 · 12 Apr · Shift 1 · Chemistry Q45

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ChemistrySingle correct+4 / -1Question 45 of 90

Among the following species the one which causes the highest CFSE, $\Delta_o$ as a ligand is :

\ce{CN-}

\ce{NH3}

\ce{F-}

Answer and worked solution

Official answer: D

CO is the strongest-field ligand in the spectrochemical series (a strong σ-donor and π-acceptor), slightly above $\ce{CN-}$ . So it gives the largest $\Delta_o$ .

Topics:Crystal field theory

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JEE Main 2014 · 12 Apr · Shift 1, Chemistry question 45