MCQ
Which of the following ions form most stable complex compound[
- ✓$C{u^{ + 2}}$
- B$N{i^{ + 2 }}$
- C$F{e^{ + 2 }}$
- D$M{n^{ + 2 }}$
$M{n^{2 + }} < F{e^{2 + }} < C{o^{2 + }} < N{i^{2 + }} < C{u^{2 + }} < Z{n^{2 + }}$
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$FeCr _{2} O _{4}+ Na _{2} CO _{3}+ O _{2} \rightarrow A + Fe _{2} O _{3}+ CO _{2}$
$A + H ^{+} \rightarrow B + H _{2} O + Na ^{+}$

$(A)$ $EDTA$ $(B)$ Coordination Compounds of $Pt$ $(C)$ $D-$Penicillamine $(D)$ Cis - Platin
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