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Q.
Which of the following salts on heating gives a mixture of two gases?
The s-Block Elements
Solution:
$Ba(NO_{3})_{2} \xrightarrow{ \Delta }BaO+2NO_{2}+\frac{1}{2}O_{2}$; Alkali metal nitrates give only $O_{2}$ gas
Alkali metal nitrates give only $O_{2}$ on heating below $500^{\circ}C$ according to following reaction,
$MNO_{3} \to MNO_{2} + O_{2}$