Question

Statement I: At equilibrium, the concentration of reactants and products remains constant.
Statement II: At equilibrium, the rates of the forward and reverse reactions are equal.

• A. Statement I and Statement II are true and Statement II is correct explanation of Statement I
• B. Statement I and Statement II are true and Statement II is not correct explanation of Statement I
• C. Statement I is true and Statement II is false
  
• D. Statement I is false and Statement I is true
  

Answer 1

The correct option is A Statement I and Statement II are true and Statement II is correct explanation of Statement I

Statement I is correct, and statement II is correct as well as correctly explains statement I.
In a chemical reaction, chemical equilibrium is the state in which both reactants and products are present in concentrations that have no further tendency to change with time. Usually, this state results when the forward reaction proceeds at the same rate as the reverse reaction. The reaction rates of the forward and backward reactions are generally not zero, but equal. Thus, there are no net changes in the concentrations of the reactant(s) and product(s). Such a state is known as dynamic equilibrium