1 Answers

A catalyst increases the rate of a chemical reaction by…

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CHEMISTRY

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

QUICK ANSWER…

C

DETAILS…  

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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KEY-POINTS…

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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