pBlock ElementsII 1 Question 23
23. A pale blue liquid obtained by equimolar mixture of two gases at $-30^{\circ} \mathrm{C}$ is
(a) $\mathrm{N} _{2} \mathrm{O}$
(b) $\mathrm{N} _{2} \mathrm{O} _{3}$
(c) $\mathrm{N} _{2} \mathrm{O} _{4}$
(d) $\mathrm{N} _{2} \mathrm{O} _{5}$
$(2005,1 \mathrm{M})$
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Answer:
Correct Answer: 23. (b)
Solution:
- Equimolar amounts of $\mathrm{NO}$ and $\mathrm{NO} _{2}$ at $-30^{\circ} \mathrm{C}$ gives $\mathrm{N} _{2} \mathrm{O} _{3}(l)$ which is a blue liquid.
$$ \mathrm{NO}(g)+\mathrm{NO} _{2}(g) \stackrel{-30^{\circ} \mathrm{C}}{\longrightarrow} \underset{(\text { Blue })}{\mathrm{N} _{2} \mathrm{O} _{3}(l)} $$
