Question

which of the following statement​are not correct?
a) a catalyst always increases the speed of a reaction
b)a catalyst does not take part in reaction
c)a catalyst may effect the nature of the product formed
d)a catalyst is always an external substance added to the reaction​

Answer 1

Answer:

the option c is incorrect

Answer 2

Answer:

C. a catalyst may effect the nature of the product formed

Explanation:

• a catalyst is an external substance added in reaction in order to increase the speed of a reaction only but does not consumed in the reaction.
• It decreases activation energy. ( curve 1 )

It increase energy of reactent.

• The catalyst has provided an alternative set of reaction steps, which we refer to as an alternative pathway. The pathway involving the catalyst requires less activation energy and is therefore faster.( see curve 2)
• it may appear in the steps of a reaction but doesn't appear in the overall reaction.

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