Given the reaction A+B→C+D, a catalyst, X, is used to increase the overall reaction and an intermediate, Y, is formed during the reaction. Without actual data, which of the following is least likely to be the rate law for the reaction?
A
Rate=k[A][B]
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B
Rate=k[A][X]
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C
Rate=k[A][Y]
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D
Rate=k
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Solution
The correct option is BRate=k[A][X] The presence of catalyst X only lowers the activation energy of reactant & thereby increasing the rate of reaction. But its concentration does not affect the rate equation.
∴(B) Rate=K[A][X] is least likely to be the rate law for the reaction.