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Question

Given the following reaction at equilibrium: N2(g)+3H2(g)2NH3(g). Some inert gas at constant pressure is added to the system. Which of the following is true?

A
More NH3(g) is produced
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B
Less NH3(g) is produced
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C
No effect on equilibrium
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D
Kp of the reaction is decreased
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Solution

The correct option is B Less NH3(g) is produced
When an inert gas is added to the system in equilibrium at constant pressure, then the total volume will increase. Hence, the number of moles per unit volume of various reactants and products will decrease. Hence, the equilibrium will shift towards the direction in which there is increase in number of moles of gases.
For the given reaction, the equilibrium will shift towards the reactants side.

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