Question

Anhydride of an acid is formed by dehydration and oxidation number of central atom remains unchanged.
Acid : $H_2{N}_2{O}_2,HN{O}_2,HN{O}_3$
Anhydride : $N_2{O}_5,N_{2}O,NO,N_2{O}_3$
Correct match of acid with its anhydride is

• A. $H_2{N}_2{O}_2\to N_{2}O$
• B. $HN{O}_2\to N_2{O}_3$
• C. $HN{O}_3\to N_2{O}_5$
• D. All are true

Answer 1

The correct option is D All are true

For the following examples, anhydride of an acid is formed by dehydration and oxidation number of central atom remains unchanged.
(A) $H_2{N}_2{O}_2\to N_{2}O+H_{2}O$; The oxidation number of N is $+1$.
(B) $2HN{O}_2\to 2N_2{O}_3+H_{2}O$; The oxidation number of N is $+3$.
(C) $2HN{O}_3\to 2N_2{O}_5+H_{2}O$; The oxidation number of N is $+5$.