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$(I)$ $1\,mol$ of $A$ and $2\,mol$ of $B$ in a $1\,L$ vessel
$(II)$ $2\,mol$ of $A$ and $2\,mol$ of $B$ in a $2\,L$ vessel
$(III)$ $0.2\,mol\, A$ and $0.2\,mol\,B$ in $0.1\,L$ vessel
Which reactant sample reacts by highest rate if reactant is in gaseous state and do not follow zero order reaction ?
$Zn(s) + Cu^{2+}(M) \to Zn^{2+}(M') + Cu(s);$ $E^o _{cell} = 1.10\,V$
$X$-axis :$log_{10}$ $\frac{{[Z{n^{2 + }}]}}{{[C{u^{2 + }}]}}$, $Y$ -axis : $E_{cell}$