1.

When NaNO_(3) is heated in a closed vessel, oxygen is liberated and NaNO_(2) is left behind. At equlibrium

Answer»

Addition of `NaNO_(2)` favours reverse reaction
Addition of `NaNO_(3)` favours forward reaction
Increasing temperatue favours forward reaction
Increasing pressure favours reverse reaction

Solution :`2NaNO_(3)hArr2NaON_(2)+O_(2)`
According to Le-chatelier principle an increase in pressure ALWAYS favours the reactin, where volume or MOLES decrease (i.e., reverse direction). As heat is added, i.e., reactin is endothermic and is SUPPORTED in forward direction with increase in temperature.


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