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Question

When the system A+BC+D is at equilibrium?


A

the forward reaction has stopped.

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B

both the forward and the reverse reactions have stopped.

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C

the reverse reaction has stopped.

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D

neither the forward nor the reverse reaction has stopped.

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Solution

The correct option is D

neither the forward nor the reverse reaction has stopped.


Expalantion for correct option:

D. neither the forward nor the reverse reaction has stopped.

Chemical equilibrium

  • In the case of chemical equilibrium, the rates of the forward and reverse reactions become equal.
  • In this case, the concentrations of the reactants and the products remain constant.
  • Chemical equilibrium is dynamic in nature wherein concentrations of both reactant and product change constantly with equal speed.
  • It is a reversible reaction in which a change in a substance can be reversed by changing the conditions.
  • Thus, neither the forward nor the reverse reaction has stopped.

Example of Chemical equilibrium:

  • In the formation of Nitrous oxide, there exist a chemical equilibrium wherein reactants and products are present in the same phases.

N2(g)+O2(g)2NO(g)

Hence, option D is the correct choice i.e. neither the forward nor the reverse reaction has stopped.


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