Which of the following is true ?

Options

A. Sodium when heated in excess of excess of oxygen gives sodium oxide
B. Oxidation state of oxygen in `KO_(2)` is `-1`
C. Sodium amalgam is better reducing agent than hydrogen
D. Sodium nitrate on heating gives nitrogen dioxide.

Answer

C

Explanation

In `(a)` sodium perocide is produced, oxidation State of oxygen in `KO_(2)` is `-1//2` , and the reaction , `(d)`, does not produce `NO_(2)`.