MCQ
$KCN$ reacts readily to give a cyanide with
- AEthyl alcohol
- ✓Ethyl bromide
- CBromobenzene
- DChlorobenzene
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$1.$ $P$ and $Q$, respectively, are the sodium salts of
$(A)$ hypochlorus and chloric acids
$(B)$ hypochlorus and chlorus acids
$(C)$ chloric and perchloric acids
$(D)$ chloric and hypochlorus acids
$2.$ $R , S$ and $T$, respectively, are
$(A)$ $SO _2 Cl _2, PCl _5$ and $H _3 PO _4$
$(B)$ $SO _2 Cl _2, PCl _3$ and $H _3 PO _3$
$(C)$ $SOCl _2, PCl _3$ and $H _3 PO _2$
$(D)$ $SOCl _2, PCl _5$ and $H _3 PO _4$
Give the answer question $1$ and $2.$
$Mn^{2+} +2e- \rightarrow Mn;\, E^o = -1.18\,V$
$2(Mn^{3+} +e^- \rightarrow Mn^{2+} )\,;\,E^o=+1.51\,V$
The $E^o$ for $3Mn^{2+} \rightarrow Mn+ 2Mn^{3+}$ will be :