Question

How many electrons should $X_2{H}_4$ liberate so that in the new compound, X shows oxidation number of $-1/2?$ [E.N. of $X.>H]$

• A. 10
• B. 4
• C. 3
• D. 2

Answer 1

Answer: (C)

Let the number of electrons liberated be $x$ then the total charge on compound will be $x$.
$\therefore 2\times \left(-\frac{1}{2}\right)+4\times 1=x$
$x=3$