Assertion (A) $\mathrm{P}_4 \mathrm{O}_{10}$ cannot be used to remove moisture from ammonia gas. Reason (R)…
Assertion (A) $\mathrm{P}_4 \mathrm{O}_{10}$ cannot be used to remove moisture from ammonia gas. Reason (R) $\mathrm{P}_4 \mathrm{O}_{10}$ reacts with $\mathrm{NH}_3$ gas. The correct answer is
Both A and (R) are correct and (R) is the correct explanation of (A)
Both A and (R) are correct and (R) is not the correct explanation of (A)
(A) is correct but (R) is not correct
(A) is not correct but (R) is correct
Solution
$\mathrm{P}_4 \mathrm{O}_{10}$ can not be used to remove moisture from ammonia gas because it reacts with $\mathrm{NH}_3$.
$
12 \mathrm{NH}_3+\mathrm{P}_4 \mathrm{O}_{10}+6 \mathrm{H}_2 \mathrm{O} \rightarrow 4\left(\mathrm{NH}_4\right)_3 \mathrm{PO}_4
$
Hence, Assertion and Reason both are correct and $(R)$ is the correct explanation of (A)