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Question: Answered & Verified by Expert
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
Chemistryp Block Elements (Group 15, 16, 17 & 18)AP EAMCETAP EAMCET 2019 (20 Apr Shift 2)
Options:
  • A Both A and (R) are correct and (R) is the correct explanation of (A)
  • B Both A and (R) are correct and (R) is not the correct explanation of (A)
  • C (A) is correct but (R) is not correct
  • D (A) is not correct but (R) is correct
Solution:
1984 Upvotes Verified Answer
The correct answer is: Both A and (R) are correct and (R) is the correct explanation of (A)
$\mathrm{P}_4 \mathrm{O}_{10}$ 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).

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