Question

The molecularity of the reaction :
2H2 +O2= 2H2O is ?
The answer is given undefined . Why ?

Answer 1

molecularity of a reaction tells the no. of molecules colliding simultaneously in a reaction to bring the chemical change..........it is undefined for reactions which involves more than one step....it is only defined for the reactions which occur in a single step.

Answer 2

Isn't this a single step reaction ?

Answer 3

no it isn't.....that's why its molecularity is undefined...

Answer 4

It looks like a single step reaction . How did you know , its not a single step reaction ?

Answer 5

u can't tell just by looking at a reaction about its no. of steps......u hv to know it before......................
and when u see that molecularity of a reaction is defined then its a single step reaction and if its undefined then its a multi-step reaction