Which of the following statements are applicable to a balanced chemical equation of an elementary reaction?
(a) Order is same as molecularity
(b) Order is less than the molecularity
(c) order is greater than the molecularity
(d) Molecularity can never be zero

Open in App

Solution

Answers: (a), and (d)
For a balanced chemical equation of an elementary reaction, the order is same as molecularity and molecularity can never be zero. If molecularity of a reaction is considered to be zero it means that no reactant is going to transform into a product. Consider a chemical reaction.
$2 N O (g) + O_{2} (g) ⟶ 2 N O_{2} (g)$
Differential rate law expression can be written as
$\frac{d R}{d t} = k [N O]^{2} [O_{2}]$
Here, molecularity = 3, order = 3

Suggest Corrections

Similar questions

For a complex reaction ......... .

(a) order of overall reaction is same as molecularity of the slowest step
(b) order of overall reaction is less than the molecularity of the slowest step
(c) order of overall reaction is greater than molecularity of the slowest step
(d) molecularity of the slowest step is never zero or non-integer

Q. Which of the following statement is/ are correct?
(i) Molecularity of a reaction cannot be fractional.
(ii) Molecularity of a reaction cannot be more than three.
(iii) Molecularity of a reaction cannot be obtained from balanced chemical equation.
(iv) Molecularity of a reaction may not be equal to the order of the reaction.

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 true?

(i) Order and molecularity may be equal for some reactions.
(ii) Order can be a fraction.
(iii) molecularity can be a fraction.
(iv) molecularity is always a whole number.

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.

Join BYJU'S Learning Program

Which of the following statements are applicable to a balanced chemical equation of an elementary reaction? (a) Order is same as molecularity (b) Order is less than the molecularity (c) order is greater than the molecularity (d) Molecularity can never be zero

Which of the following statements are applicable to a balanced chemical equation of an elementary reaction?
(a) Order is same as molecularity
(b) Order is less than the molecularity
(c) order is greater than the molecularity
(d) Molecularity can never be zero