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Standard XII
Chemistry
Characteristics of Chemical Equilibrium
Question

Which of the following factors are equal in a reversible chemical reaction at equilibrium?
  1. The number of moles of the reactants and products
  2. The potential energies of the reactants and products
  3. The activation energies of the forward and reverse reactions
  4. The rates of reaction for the forward and reverse reactions
  5. The concentrations of the reactants and products.

A
The number of moles of the reactants and products
B
The concentrations of the reactants and products.
C
The potential energies of the reactants and products
D
The activation energies of the forward and reverse reactions
E
The rates of reaction for the forward and reverse reactions
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Solution
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The rates of reaction for the forward and reverse reactions are equal in a reversible chemical reaction at equilibrium. When the concentrations of reactants and products have become constant, a reaction is said to have reached a point of equilibrium. The consistency of measurable properties such as concentration, color, pressure and density can show a state of equilibrium. The rates of the two opposing reactions have become equal. The amount of products and reactants produced are consistent, and there is no net change.

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