${C}_{2} {H}_{7} {~N}+\left(2 {x}+\frac{{y}}{2}\right) {CuO} \rightarrow {x\,CO}_{2}+\frac{y}{2} {H}_{2} {O}+\frac{{z}}{2} {~N}_{2}+\left(2\, {x}+\frac{{y}}{2}\right) {Cu}$
$y$નું મૂલ્ય $......$ છે.(નજીકના પૂર્ણાંકમાં)
On balancing
${C}_{2} {H}_{7} {~N}+\frac{15}{2} {CuO} \rightarrow 2 {CO}_{2}+\frac{7}{2} {H}_{2} {O}+\frac{1}{2} {~N}_{2}+\frac{15}{2} {Cu}$
On comparing
${y}=7$