
Which of the following statements is not correct for the catalyst?
A. it catalyses the forward and backward reaction to the same extent.
B. it alters of the reaction.
C. it is a substance that does not change the equilibrium constant of a reaction.
D. if provides an alternate mechanism by reducing activation energy between reactants and
products.
Answer
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Hint: Catalyst is a common word that you might come across while studying chemistry especially while learning about chemical reactions. While some of the chemical reactions occur quickly, some take a long time and require extra materials or effort. So, catalysts are defined as those substances which alter the rate of reaction by changing the path of reaction.
Complete answer:
A catalyst can be either solid, liquid or gaseous catalyst. A catalyst increases reaction rates in a slightly different way from other methods of increasing reaction rate. The function of a catalyst is to lower the activation energy so that a greater proportion of the particles have enough energy to react.
Types of Catalysts are:
1) Positive Catalysts : Catalysts which increase the rate of a chemical reaction are positive catalysts.
2) Negative Catalysts: Catalysts which decrease the rate of reaction and negative catalyst.
The function of a catalyst is to lower the activation energy so that a greater proportion of the particles have enough energy to react.
A catalyst increases the rate of reaction by decreasing the activation energy of the reaction. It does not affect the Gibbs free energy of the reaction.
Thus, the statement given in option (B) is incorrect.
Note: In essence, catalysts encourage molecules to react and make the whole reaction process easier and efficient.
Complete answer:
A catalyst can be either solid, liquid or gaseous catalyst. A catalyst increases reaction rates in a slightly different way from other methods of increasing reaction rate. The function of a catalyst is to lower the activation energy so that a greater proportion of the particles have enough energy to react.
Types of Catalysts are:
1) Positive Catalysts : Catalysts which increase the rate of a chemical reaction are positive catalysts.
2) Negative Catalysts: Catalysts which decrease the rate of reaction and negative catalyst.
The function of a catalyst is to lower the activation energy so that a greater proportion of the particles have enough energy to react.
A catalyst increases the rate of reaction by decreasing the activation energy of the reaction. It does not affect the Gibbs free energy
Thus, the statement given in option (B) is incorrect.
Note: In essence, catalysts encourage molecules to react and make the whole reaction process easier and efficient.
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