Question

$M{g}_3{N}_2\stackrel{H_{2}O}{\to }A\left(gas\right)\underset{△}{\overset{CuO}{\to }}B+C\left(g\right)+H_{2}O$
$C\left(g\right)$ can be obtained by heating:

• A. $(N{H}_4{)}_{2}S{O}_4$
• B. $(N{H}_4{)}_{2}C{r}_2{O}_7$
• C. $N{H}_{4}N{O}_3$
• D. $N{H}_{4}Cl$

Answer 1

The correct option is B $(N{H}_4{)}_{2}C{r}_2{O}_7$

$M{g}_3{N}_2\stackrel{3H_{2}O}{\to }\underset{\left(A\right)}{2N{H}_3}+3MgO$

$N{H}_3\stackrel{CuO}{\to }\underset{\left(C\right)}{N_2}\left(g\right)+\underset{\left(B\right)}{Cu}+H_{2}O$

$N_2$ will be obtained by decomposition of Ammonium dichromate.

$\left(N{H}_4{)}_{2}C{r}_2{O}_7\right(s)⟶C{r}_2{O}_3(g)+\underset{\left(C\right)}{N_2}+4H_{2}O$ .