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Question

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

Column IColumn II
(A) Laughing gas(i) Hydrazoic acid
(B) Anhydride of HNO3(ii) Nitrous oxide
(C) Anhydride of HPO3(iii) Nitrogen pentoxide
(D) Acid hydride of nitrogen(iv) Phosphorus pentoxide

A
(A) (i), (B) (ii), (C) (iii), (D) (iv)
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B
(A) (iv), (B) (i), (C) (ii), (D) (iii)
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C
(A) (ii), (B) (iii), (C) (iv), (D) (i)
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D
(A) (iii), (B) (iv), (C) (i), (D) (ii)
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Solution

The correct option is D (A) (ii), (B) (iii), (C) (iv), (D) (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 HNO3 anhydride means a compound obtained after water has been removed from other compounds.
From HNO3,H2O can't be removed so, if we take 2(HNO3)
H2N2O6−−−H2ON2O5 (nitrogen penta-oxide)
(C) Anhydride of HPO3
Similarly as above if we take
2[HPO3]=H2P2O6H2O−−−P2O5 (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.
N2H4+HNO2HN3+2H2O

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