Explain this 71 question.....
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Explanation: According to the Le chatlier's principle ,the equilibrium will shift in the direction where the number of moles of gas are more as shift always happens to undo the change.So if we if decrease the pressure the reaction will shift to ards the side which has greater number of moles which is reaction 3 .
In reaction 3 the moles of products is greater than the reactants so if pressure is decreased ,the Equilibrium will shift towards the product side.
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