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Question

For a reversible system, when the concentration of the reacting system in equilibrium is increased then

A
a forward reaction will take place.
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B
a backward reaction will take place.
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C
new equilibrium mixture will contain a higher concentration of the reactant.
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D
new equilibrium mixture will contain a lesser concentration of the product.
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Solution

The correct option is A a forward reaction will take place.

Concentration is one of the factors which affects the chemical equilibrium of the reversible system.

  • If the concentration of the reacting species is increased then as per Le Chatelier's principle equilibrium shifts to reduce the reactant concentration. A forward reaction will be favoured. The new equilibrium mixture will contain a higher concentration of the product.
  • If the concentration of the reacting species is decreased then as per Le Chatelier's principle equilibrium shifts to increase the reactant concentration. A backward reaction will be favoured. The new equilibrium mixture will contain a higher concentration of the reactant.

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