Moderate

Just before reversible reaction attains equilibrium it is found that

Correct answer: B. The velocity of forward reaction is decreasing and that of backward reaction is increasing

  • A. The velocity of forward reaction increasing and that of backward reaction decreasing
  • B. The velocity of forward reaction is decreasing and that of backward reaction is increasing
  • C. Velocity of both reactions is decreasing
  • D. Velocity of both reactions is increasing

Explanation

This is false because the reactants keep getting consumed and hence the forward velocity should decrease This statement is correct as , the reaction proceeds towards equilibrium concentration of reactants decreases as they are being converted into products and hence the velocity of forward reaction decreases. Also ,conc. Of products increases and hence the velocity of backward reaction increases as they are being converted to reactants This is not true because if this would have been the case the net rate would not have been able to reach zero which is an essential condition for dynamic equilibrium This is not true because if this would have been the case the net rate would not have been able to reach zero which is an essential condition for dynamic equilibrium

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About Chemical Equilibrium

Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.

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