Moderate

If the energy of activation of a chemical reaction is very low, the rate of that chemical reaction is observed to be very high because?

Correct answer: C. Number of efficient or fruitful collisions increase

  • A. Concentration of the reactants becomes irrelevant
  • B. Reaction proceeds without any transition state
  • C. Number of efficient or fruitful collisions increase
  • D. Molecules of the reactants move slowly

Explanation

Option A is incorrect because the concentration of reactants, still, is a factor regardless of other factors such as low activation energy. (Same goes for all other factors that affect the rate of reaction) Option B is incorrect, as the transition state is always present regardless of activation energy. Option C is correct, as low activation energy means that many more reactant particles have the minimum energy required to produce products so, with a greater number of particles possessing energy equal to or greater than the activation energy collide, they produce products. Hence, more fruitful collisions occur. Option D is incorrect, as reactant particles move slowly if there is less heat energy applied, which was not mentioned in the question.

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About Reaction Kinetics

Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.

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