Question

Samwell is almost done!
Elementary reactions are classified based on?

• A. Order
• B. Rate constant
• C. Molecularity
• D. Phase of reactants

Answer 1

The correct option is C Molecularity

As we have seen, elementary reactions are classified based on the molecularity of the reaction.

Accordingly we have the following classification,

Uni-molecular
$A\to products$
$N_2{O}_4\left(g\right)\to 2N{O}_2\left(g\right)$


Bimolecular
$A+B\to products$
$2NOCl\left(g\right)\to 2NO\left(g\right)+C{O}_2$

$A+A\to products$
$CO\left(g\right)+N{O}_3\to N{O}_2\left(g\right)+C{O}_2\left(g\right)$


Termolecular
$A+A+B\to products$
$2NO\left(g\right)+O\to 2N{O}_2\left(g\right)$