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A catalyst increases the rate of a chemical reaction by…

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A catalyst increases the rate of a chemical reaction by providing a path that…

A. raises the activation energy

B. increases the temperature

C. lowers the activation energy

D. increases the concentration




Activation energy is the quantity of energy that must be supplied to a chemical reaction in order to trigger it. It is the minimum quantity of energy needed for a specific chemical reaction to occur, this is why it is called energy barrier.

Therefore, lowering this energy barrier will make it possible for a smaller quantity of energy to trigger the reaction, thereby increasing the rate of reaction, this is exactly what a catalyst does.

Now for the right answer to the above question:

  1. Option A is incorrect. raising the activation energy will slow down the rate of chemical reaction.
  2. Option B is incorrect. a catalyst does not manipulate the temperature of any reaction.
  3. C is correct. yes, lowering the activation energy makes the reaction easily proceed even in a faster way.
  4. D is not the correct answer. Catalysts do not control the concentration of reactants.
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You may please note these/this:

  • Activation energy is the energy limit which must be met in order for a reaction to occur, lowering it helps in making smaller quantities of energies run the reaction and even in a faster way.

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/ culled from 2016 JAMB-UTME Chemistry past question 29 /

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