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  4. Sodium nitrate decomposes above ≈; 800° C to give

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Q. Sodium nitrate decomposes above $ \approx; 800^\circ C $ to give

IIT JEEIIT JEE 1998The s-Block Elements

Solution:

$ NaNO_3 $ when heated, it decomposes in two stages as:
$ NaNO_3 \xrightarrow {T < 500^{\circ} C} NaNO_2 + \frac{1}{2} O_2 $
$ NaNO_2 \xrightarrow {T > 800^{\circ} C} Na_2O + N_2 + O_2 $