MCQ
$C{u^{2 + }}(aq.) + {X^ - }(aq.)\xrightarrow{{R.T.}}CuX \downarrow + {X_2}$
$'X'$ cannot be
- ✓$Cl^- (aq.)$
- B$I^- (aq.)$
- C$CN^- (aq.)$
- D$SCN^- (aq.)$
✓
Answer
Correct option: A.
$Cl^- (aq.)$
a
$Cu^{2+}(aq.)$ has oxidizing property it oxidizes $I^-(aq.)$ $CN^-(aq.)$ $SCN^-(aq.)$ into $I_2,\,(CN)_2,\,(SCN)_2$ respectively but does not oxidize $Cl^-(aq.)$ as it is weaker reductant.
$Cu^{2+}(aq.)$ has oxidizing property it oxidizes $I^-(aq.)$ $CN^-(aq.)$ $SCN^-(aq.)$ into $I_2,\,(CN)_2,\,(SCN)_2$ respectively but does not oxidize $Cl^-(aq.)$ as it is weaker reductant.
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