sblock Elements 1 Question 23
«««< HEAD
41. Sodium nitrate decomposes above $\approx 800^{\circ} \mathrm{C}$ to give
======= ####41. Sodium nitrate decomposes above $\approx 800^{\circ} \mathrm{C}$ to give
3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed (a) $\mathrm{N}_{2}$
(b) $\mathrm{O}_{2}$
(c) $\mathrm{NO}_{2}$
(d) $\mathrm{Na}_{2} \mathrm{O}$
$(1998,2 \mathrm{M})$
Show Answer
Answer:
Correct Answer: 41. $(a, b, d)$
Solution:
- $\mathrm{NaNO}_{3}$ when heated, it decomposes in two stages as:
$$ \begin{aligned} & \mathrm{NaNO}{3} \xrightarrow{T<500^{\circ} \mathrm{C}} \mathrm{NaNO}{2}+\frac{1}{2} \mathrm{O}{2} \ & \mathrm{NaNO}{2} \xrightarrow{T>800^{\circ} \mathrm{C}} \mathrm{Na}{2} \mathrm{O}+\mathrm{N}{2}+\mathrm{O}_{2} \end{aligned} $$
