Upon heating the presence | Chemistry | JEE Advance 2017

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Upon heating $\mathrm{KClO}_3$ in the presence of catalytic amount of $\mathrm{MnO}_2$, a gas W is formed. Excess amount of $W$ reacts with white phosphorus to give $X$. The reaction of $X$ with pure $\mathrm{HNO}_3$ gives $Y$ and $Z$.
Y and Z are, respectively :

Select the correct option:

A

$\mathrm{N}_2 \mathrm{O}_5$ and $\mathrm{HPO}_3$

B

$\mathrm{N}_2 \mathrm{O}_3$ and $\mathrm{H}_3 \mathrm{PO}_4$

C

$\mathrm{N}_2 \mathrm{O}_4$ and $\mathrm{H}_3 \mathrm{PO}_3$

D

$\mathrm{N}_2 \mathrm{O}_4$ and $\mathrm{HPO}_3$

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