Which of the following statements would be most accurate for a reaction between $A, B,$ and $C$ forming $D$ and $E$ ?

A number of different mechanisms can be postulated for the overall reaction.

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The reaction is third order overall since there are three reactants.

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Experimentation can be used to correctly identify the only rate law for the reaction along with the only possible mechanism.

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A catalyst was definitely used since there are three reactants and only two products.

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Solution

The correct option is B A number of different mechanisms can be postulated for the overall reaction.
$A + B + C ⟶ D + E$
The reaction taking place can follow various mechanisms for the overall reaction. Therefore its order cannot be found out. Also, experimentation can be used correctly so it cannot be fixed for all the mechanisms.

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Similar questions

Q. Given the reaction

A + B \to 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 reaction takes place in three steps. The rate constant of the three steps are $k_{1}, k_{2}$ and $k_{3}$ respectively. The overall rate constant $k = \frac{k_{1} k_{3}}{k_{2}} .$ The energy of activation for the three steps are 40, 30 and 20 kJ respectively. Therefore: