The compound(s) formed upon combustion of sodium metal in excess air is (are)

The compound(s) formed upon combustion of sodium metal in excess air is (are)
  1. $\mathrm{Na}_2 \mathrm{O}_2$
  2. $\mathrm{Na}_2 \mathrm{O}$
  3. $\mathrm{NaO}_2$
  4. $\mathrm{NaOH}$

Solution

Sodium on heating in air forms both normal oxide and peroxides.

Asked in: JEE Advanced 2009 (Paper 1)

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