Q. Boric acid on heating at $150° C$ gives

3797 204 The p-Block Elements Report Error

A

$B_{2} O_{3}$

B

$H_{2} B O_{3}$

C

$H B O_{2}$

D

$H_{2} B_{4} O_{7}$

Solution:

$4 H_{3} B O_{3} \to H_{2} B_{4} O_{7} + 5 H_{2} O$