What influence does an increase in reactant concentration have on the system which is in equilibrium?

Equilibrium will shift to increase the product concentration.

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A forward reaction will be favoured.

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A backward reaction will be favoured.

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Equilibrium will shift to decrease the reactant concentration.

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Solution

The correct option is D
Equilibrium will shift to decrease the reactant concentration.

According to Le Chatelier's principle if there is a change in concentration, pressure or temperature of a system in equilibrium then the system will readjust itself to counteract the change and attain the equilibrium.

In the given equation, the concentration of the reactant is increased. The system will readjust itself to decrease the reactant concentration. A forward reaction will be favoured. Hence, the new equilibrium mixture will contain a higher concentration of the product.

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