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For complex ion/compound formation reactions
$(I) {Co}^{3 +} (aq) + {EDTA}^{4 -} ⟶ P$
$(II) {Ni}^{2 +} (aq) + dmg (excess) \overset{{NH}_{4} OH}{⟶} Q$
$(III) {Zn}^{2 +} (aq) + gly (excess) ⟶ R$
$(IV) {Pt}^{4 +} (aq) + en (excess) ⟶ S$
Which of the following complex ion/compound does not exhibit optical activity ?

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answer is B.

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Detailed Solution

${Ni}^{2 +} (aq)$ with DMG (dimethylglyoxime) form square plaaar complex which is obtically inactive. While $[Co (EDTA)]^{-}, {[Zn (gly)_{2}]}^{2 +} and {[Pt (en)_{3}]}^{4 +}$ are optically active as they do not have P.O.S.

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