Among the ligands NH3,en,CN− and CO the correct order of their increasing field strength, is
A
CO<NH3<en<CN−
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B
NH3<en<CN−<CO
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C
CN−<NH3<CO<en
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D
en<CN−<NH3<CO
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Solution
The correct option is BNH3<en<CN−<CO Using the concept of spectrochemical series ligands arranged in increasing order of crystal field strength are NH3<en<CN−<CO