Question

What will be the oxidation number of underlined element
$\underset{--}{Cr}{O}_{2}C{l}_2$

• A. 2
• B. 6
• C. 4
• D. -4

Answer 1

The correct option is B 6

Let oxidation number of Cr be 'x' in $Cr{O}_{2}C{l}_2$
$\text{Oxidation number of}Cl=-1$
$\text{Oxidation number of}O=-2$
Let the Oxidation number of Cr is $x.$
$x+2\times (-2)+2\times (-1)=0$
$x=+6$