Question

Each oxy-acid contains at least one $X—OH$ unit ($X$ is non-metal). The $H$-atom of $X—OH$ unit is ionisable and the number of $—OH$ groups directly attach to non-metal decides the basicity Of oxy acid.

Which of the following hypoform of oxy-acid can exhibit tautomerism ?

• A. $H_2{N}_2{O}_2$
• B. $H_4{P}_2{O}_6$
• C. $H_2{S}_2{O}_6$
• D. $H_{3}P{O}_3$

Answer 1

The correct option is A $H_2{N}_2{O}_2$


$\therefore$ option (a) is correct.