Q. The oxidation number of As in $H_{3} A s O_{4}$

1610 273 Rajasthan PMTRajasthan PMT 1997 Report Error

A

$- 1$

B

$- 3$

C

$+ 3$

D

$+ 5$

Solution:

Oxidation number of as in $H_{3} A s O_{4}$ $3 + x + (4 \times - 2) = 0$ $3 + x - 8 = 0$ $x = 5$