Question

Which of the following is the anhydride of $HN{O}_3$

• A. $NO$
• B. $N_2{O}_3$
• C. $N_2{O}_4$
• D. $N_2{O}_5$

Answer 1

The correct option is D

$N_2{O}_5$

Anhydride is the compound obtained by removing the elements of water from a particular compound.The anhydride of an acid is the acidic oxide which on hydration forms the acid. $N_2{O}_5$ dissolves in water to give nitric acid.

$N_2{O}_5+H_{2}O\to 2HN{O}_3$