Question

What is oxidation number of hydrogen in $NaH$?

• A. - 2
• B. -1
• C. + 1
• D. zero

Answer 1

The correct option is B

-1

-1

In $NaH$ hydrogen is relatively more electronegative than sodium and hence, the oxidation number of hydrogen is -1

By the placement of elements we could understand the relative electropositivity of elements involved.