Question

It has $d^{2}s{p}^2$ hybridisation. $(N{H}_4{)}_{2}C{r}_2{O}_7$ on heating gives a gas /vapour, which is also produced in significant quantity by:
(I) heating $N{H}_{4}Cl$
(II) heating $CuS{O}_{4}5H_{2}O$
(III) heating $Ba(N_3{)}_2$
(IV) treating $NaN{O}_3$ with $Zn$ in basic medium.

• A. Only III
• B. I , IV
• C. Only IV
• D. II, III

Answer 1

Answer: (A)

Only III

$(N{H}_4{)}_{2}C{r}_2{O}_7$ gives $N_2$ gas on heating, similarly

$Ba\left(N_3\right)2\to Ba+3N_2$

$\therefore$ (A) only III.