Q. The oxidation number of chromium in potassium dichromate is
A) +2
B) +4
C) +6
D) +8
Explanation
(c)
Let the oxidation number of Cr be $x$
$\therefore\ \ For\ K_{2}{Cr}_{2}O_{7}$
$+ 1 \times 2 + 2x + 7( - 2) = 0$
$2 + 2x - 14 = 0$
$2x = 12$
$x = 6$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.