Question

Match the column I with column II and mark the appropriate choice.

Column I	Column II
(A) Laughing gas	(i) Hydrazoic acid
(B) Anhydride of $HN{O}_3$	(ii) Nitrous oxide
(C) Anhydride of $HP{O}_3$	(iii) Nitrogen pentoxide
(D) Acid hydride of nitrogen	(iv) Phosphorus pentoxide

• A. (A) $\to$ (i), (B) $\to$ (ii), (C) $\to$ (iii), (D) $\to$ (iv)
• B. (A) $\to$ (iv), (B) $\to$ (i), (C) $\to$ (ii), (D) $\to$ (iii)
• C. (A) $\to$(ii), (B) $\to$(iii), (C) $\to$ (iv), (D) $\to$ (i)
• D. (A) $\to$ (iii), (B) $\to$(iv), (C) $\to$(i), (D) $\to$ (ii)

Answer 1

Answer: (C)

(A) $\to$(ii), (B) $\to$(iii), (C) $\to$ (iv), (D) $\to$ (i)

(A) Laughing Gas$⟶$ Nitrous oxide.

As this gas sometimes generates a feeling of euphoria due to which a person wants to laugh after smelling it.

(B) Anhydride of $HN{O}_3⟶$ anhydride means a compound obtained after water has been removed from other compounds.

From $HN{O}_3,H_{2}O$ can't be removed so, if we take $2\left(HN{O}_3\right)$

$⟶H_2{N}_2{O}_6\underset{-H_{2}O}{\overset{}{\to }}{N}_2{O}_5$ (nitrogen penta-oxide)

(C) Anhydride of $HP{O}_3$

Similarly as above if we take

$2\left[HP{O}_3\right]=H_2{P}_2{O}_6\underrightarrow{-H_{2}O}{P}_2{O}_5$ (Phosphorus Pentaoxide)

(D) Acid Anhydride of nitrogen.

Acid Anhydride is formed by the combination of two acid structures with an ion of a water molecule.

Hydrazine reacts with nitrous acid giving acid anhydride of nitrogen, i.e, hydrazoic acid with loss of $2$ molecules of water.

$N_2{H}_4+HN{O}_2⟶H{N}_3+2H_{2}O$