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NEET levelSingle correct optionDifficulty 1 of 3sb111

Which oxide is the main product when sodium is burnt in excess air or oxygen?

A $Na X_{2} O$
B $NaO X_{2}$
C $Na X_{2} O X_{2}$
D $Na X_{3} O$

Answer: C

Sodium burns in excess oxygen to form the peroxide:

2 Na + O X_{2} Na X_{2} O X_{2}

. The normal oxide

Na X_{2} O

forms only in a limited supply of oxygen. Hence the main product is

Na X_{2} O X_{2}

.

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