A nitrate decomposes thermally to give an oxide of group 15 element. This oxide cannot be obtained by direct combination of the element and the oxygen. The trichloride of this group 15 element can hydrolyse only partially. The oxide is

Options

A. `Bi_(2)O_(3)`
B. `P_(2)O_(3)`
C. `Sb_(2)O_(3)`
D. `N_(2)O`

Answer

A

Explanation

The tri-oxides of N and Bi can’t be obtained by direct combination with oxygen. But out of N and Bi, `NCl_(3)` hydrolysis completely while `BiCl_(3)` hydrolysis partially. Hence the oxide is `Bi_(2)O_(3)` the reaction involved are
`Bi(NO_(3))_(2) overset(Delta)toBi_(2)O_(3) +3NO_(2)`
`BiCl_(3)+H_(2)O to BiOCl +2HCl`