Which of the following oxides will be the least acidic?

Options

A. `P_(4)O_(6)`
B. `P_(4)O_(10)`
C. `As_(4)O_(6)`
D. `As_(4)O_(10)`

Answer

3

Explanation

As we move down the group the acidic character of oxides ( in a given oxidation state)decreases .Thus `P` oxides are more acidic than `As` oxide for different oxides of the same element ,the acidic character increase as the oxidation number of the central atom increase. Thsu the correct order of acidic character is
`overset(+5)(P_(4))O_(10) gt overset(+3)(P_(4))O_(6) gt overset(+5)(As_(4))O_(10) gt overset(+3)(As_(4))O_(6)`