Question

The oxidation number of platinum in ${\left[Pt\left(C_2{H}_4\right)C{l}_3\right]}^{-}$is:

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

Answer: (B)

Let the oxidation state of Pt is $x$ in ${\left[Pt\left(C_2{H}_4\right)C{l}_3\right]}^{-}$
$x+0+3(-1)=-1$
$x+0-3=-1$
$x=+2$