Differentiate between Complex reaction and elementary reaction?

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Solution

Elementary reaction Complex reaction
Only one step reactions Two or more steps reactions.
No intermediate With intermediate formation
Only one transition state Multiple transition states

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Why molecularity is applicable only for elementary reactions and order is applicable for elementary as well as complex reactions?

Q. Which of the following statements are correct?

(i) Law of mass action and rate law expressions are same for single step reaction.
(ii) Order of the slowest elementary reaction of a complex reaction gives the order of the complex reaction.
(iii) Both order and molecularity have normally a maximum value of 3.
(iv) Molecularity of a complex reaction

A + 2 B \to C

is 3.

The chemical reaction $2 O_{3} \to 3 O_{2}$ involves two elementary steps :
$O_{3} f a s t - - \to O_{2} + O; O + O_{3} S l o w - -- \to 2 O_{2}$
The differential rate law expression will be :

Q. Differentiate between exergonic and endergonic reactions.

Differentiate between combination and decomposition reaction.

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Elementary reaction	Complex reaction
Only one step reactions	Two or more steps reactions.
No intermediate	With intermediate formation
Only one transition state	Multiple transition states

Differentiate between Complex reaction and elementary reaction?

Elementary reaction Complex reaction Only one step reactions Two or more steps reactions. No intermediate With intermediate formation Only one transition state Multiple transition states

Elementary reaction Complex reaction
Only one step reactions Two or more steps reactions.
No intermediate With intermediate formation
Only one transition state Multiple transition states