Rationalised 2023-24
70
Chemistry
NH4NO2 ® N2 + 2H2O
Bimolecular reactions involve simultaneous collision between two
species, for example, dissociation of hydrogen iodide 2HI ® H2 + I2
Trimolecular or termolecular reactions involve simultaneous collision
between three reacting species, for example,
2NO + O2 ® 2NO2
The probability that more than three molecules can collide and
react simultaneously is very small Hence, reactions with the
molecularity three are very rare and slow to proceed It is, therefore, evident that complex reactions involving more than
three molecules in the stoichiometric equation must take place in more
than one step