(A) $\mathrm{Cu}^{+} \rightarrow \mathrm{Cu}^{2+}+\mathrm{Cu}$
(B) $3 \mathrm{MnO}_4^{2-}+4 \mathrm{H}^{+} \rightarrow 2 \mathrm{MnO}_4^{-}+\mathrm{MnO}_2+2 \mathrm{H}_2 \mathrm{O}$
(C) $2 \mathrm{KMnO}_4 \rightarrow \mathrm{K}_2 \mathrm{MnO}_4+\mathrm{MnO}_2+\mathrm{O}_2$
(D) $2 \mathrm{MnO}_4^{-}+3 \mathrm{Mn}^{2+}+2 \mathrm{H}_2 \mathrm{O} \rightarrow 5 \mathrm{MnO}_2+4 \mathrm{H}^{+}$
નીચે આપેલા વિકલ્પોમાંથી સાચો જવાબ પસંદ કરો :
$xCu\,\,\, + \,\,\,\,yHN{O_3}\,\,\, \to \,\,\,\,xCu{\left( {N{O_3}} \right)_2}\,\,\, + \,\,\,NO\,\,\,\, + \,\,\,N{O_2}\,\,\, + \,\,\,3{H_2}O$ તે સર્હીુણકો $x$ અને $y$ શું હશે ?
આપેલ : $2 Cu ^{2+}+4 I ^{-} \rightarrow Cu _{2} I _{2}+ I _{2}$
$I _{2}+2 S _{2} O _{3}{ }^{2-} \rightarrow 2 I ^{-}+ S _{4} O _{6}{ }^{2-}$