Question

The compound(s) which generate(s) $N_2$ gas upon thermal decomposition below ${300}^o$C is/are:

• A. $N{H}_{4}N{O}_3$
• B. $(N{H}_4{)}_{2}C{r}_2{O}_7$
• C. $Ba(N_3{)}_2$
• D. $M{g}_3{N}_2$

Answer 1

Answer: (B), (C)

The correct options are
B $(N{H}_4{)}_{2}C{r}_2{O}_7$
C $Ba(N_3{)}_2$

(A) $N{H}_{4}N{O}_3\underset{below{300}^{o}C}{\overset{\Delta }{\to }}{N}_{2}O+2H_{2}O$

(B) $(N{H}_4{)}_{2}C{r}_2{O}_7\stackrel{\Delta }{\to }{N}_2+C{r}_2{O}_3+4H_{2}O$

(C) $Ba(N_3{)}_2\stackrel{\Delta }{\to }Ba+3N_2$

(D) $M{g}_3{N}_2$ (it does not decompose into $N_2$)

Hence, option $B$ and $C$ are correct.