$I.\,C{r_2}{O_7}^{2 - }\, + \,2O{H^ - }\, \to \,Cr{O_4}^{2 - }\, + \,{H_2}O$
$II.\,Zn\, + \,CuS{O_4}\, \to \,ZnS{O_4}\, + \,Cu$
$III.\,2Mn{O_4}^ - \, + \,3M{n^{2 + }}\, + \,4O{H^ - }\, \to \,5Mn{O_2}\, + \,2{H_2}O$
$IV.\,2C{u^ + }\, \to \,Cu\, + \,C{u^{2 + }}$
$C + {O_2} \to C{O_2};\Delta H = - 393\,J$
$2Zn + {O_2} \to 2ZnO;\Delta H = - 412\,J$
${H_2}O + B{r_2} \to HOBr + HBr$
$C{r_2}O_7^{2 - } + F{e^{2 + }} + {C_2}O_4^{2 - } \to C{r^{3 + }} + F{e^{3 + }} + C{O_2}$ (અસંતુલિત)
આપેલ સમીકરણમાં $x, y$ અને $z$ની અનુક્રમે કિમત જણાવો.
${H_2}\mathop S\limits^{ } {O_4}\,\,\,\,\, \to \,\,\,\,\,\mathop S\limits^{ } {O_2}$