Question

In potassium dichromate, $K_{2}C{r}_2{O}_7$, find the oxidation state of chromium?

• A. 12
• B. 1
• C. 6
• D. 3
• E. 2

Answer 1

Answer: (C)

6

Let, $X$ be the oxidation state of $Cr$ in $K_{2}C{r}_2{O}_7$.
$2(+1)+2X+7(-2)=02+2X-14=02X=12X=+6$
Hence, the oxidation state of $Cr$ in $K_{2}C{r}_2{O}_7$ is +6.