Consider the following reactions (unbalanced)\ $\mathrm{Zn}+$ hot conc. $\mathrm{H}_{2} \mathrm{SO}

Question

Consider the following reactions (unbalanced)\ $\mathrm{Zn}+$ hot conc. $\mathrm{H}_{2} \mathrm{SO}_{4} ightarrow G+R+X$\ $\mathrm{Zn}+$ conc. $\mathrm{NaOH} ightarrow T+Q$\ $G+\mathrm{H}_{2} \mathrm{~S}+\mathrm{NH}_{4} \mathrm{OH} ightarrow Z($ a precipitate $)+X+Y$\ Choose the correct option(s).\

Professor PC Thomas Classes · Answer

$(\mathrm{a}, \mathrm{c}, \mathrm{d})$ :\ $\underset{	ext { (hot \& conc.) }}{\mathrm{Zn}}+\underset{(\mathrm{G})}{2 \mathrm{H}_{2} \mathrm{SO}_{4}} \underset{(R)}{\mathrm{ZnSO}_{4}}+\underset{(\mathrm{X})}{\mathrm{SO}_{2}}+\underset{	ext { ( }}{2 \mathrm{H}_{2} \mathrm{O}}$\ $\underset{	ext { (conc.) }}{\mathrm{Zn}}+\underset{(T)}{2 \mathrm{NaOH}} ightarrow \underset{	ext { (Q) }}{\mathrm{Na}_{2} \mathrm{ZnO}_{2}}+\mathrm{H}_{2}$\ $\mathrm{ZnSO}_{4}+\mathrm{H}_{2} \mathrm{~S}+2 \mathrm{NH}_{4} \mathrm{OH}_{(a q)} ightarrow$\ (G) $$ \underset{\substack{	ext { (dirty white } \ 	ext { ppt.) }(Z)}}{\mathrm{ZnSS} \downarrow}+\underset{(Y)}{\left(\mathrm{NH}_{4}ight)_{2} \mathrm{SO}_{4}}+\underset{(X)}{2 \mathrm{H}_{2} \mathrm{O}} $$ Oxidation state of Zn in $T$ is +2 .\