Which of the following statements are applicable to a balanced chemical equation of an elementary reaction ?

Options

A. Order is same as molecularity
B. Order is less than the molecularity
C. Order is greater than the molecularity
D. Molecularity can never he zero

Answer

A, D

Explanation

For a balanced chemical equation of an elementary reaction order is same as molecularity ard molecularity can never be zero. It molecularity of a reaction is considered to be zero it mean that no reactant is going to transform into product. Consider a chemical reaction.
`2NO(g) + O_(2) (g) to 2NO_(2)(g)`
Differential rate law expression can be writlen as
`(dR)/(dt) = k[NO]^(2) [O_(2)]`
Here, molecularity = 3 order= 3