Question

$P_4O_{10}$ is the anhydride of

• A. $H_3PO_2$
• B. $H_3PO_3$
• C. $H_3PO_4$
• D. $H_4P_2O_7$

Answer 1

Answer: (C)

$H_3PO_4$

Answer 2

$4 H _{3} PO _{4} \ce{->[{\Delta}]} P _{4} O _{10}+6 H _{2} O$