Question

An inorganic salt (A) is decomposed at about 523 K to give products (B) and (C). Compound (C) is a liquid at room temperature and is neutral to litmus paper while oxide (B) on burning with phosphorous, given a dehydrating agent (D). Compounds (A),(B),(C) and (D) will be identified as :

• A. $N{H}_{4}N{O}_3,N_{2}O,H_{2}O,P_2{O}_5$
• B. $N{H}_{4}N{O}_2,k_{2}O,H_{2}O,P_2{O}_5$
• C. $CaC{O}_3,CaO,H_{2}O,CaC{l}_2$
• D. $CaC{O}_3,CaO,H_{2}O,Ca(OH{)}_2$

Answer 1

The correct option is A $N{H}_{4}N{O}_3,N_{2}O,H_{2}O,P_2{O}_5$

$N{H}_{4}N{O}_3\to N_{2}O+2H_{2}O$. Here B is $N_{2}O$ and C is $H_{2}O$ which is liquid at room temperature and is neutral to litmus paper. $N_{2}O$ reacts with $P$ to form $P_2{O}_5$ which is D and a dehydrating agent.
$10N_{2}O+4P\to 2P_2{O}_5+10N_2$