Ncert Exercises & Solutions

The correct statements among the following regarding a balanced chemical equation of an elementary reaction are-

a.	Order is the same as molecularity.
b.	Order is less than the molecularity.
c.	Order is greater than molecularity.
d.	Molecularity can never be zero.

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Hint: For an elementary reaction order of the reaction is same as molecularity

For a balanced chemical equation of an elementary reaction, the order is the same as molecularity and molecularity can never be zero. If the 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.

$2 N O (g) + O_{2} (g) \to 2 N O_{2} (g)$

Differential rate law expression can be written as

$\frac{dR}{dt} = k [NO]^{2} [O_{2}]$

Here, molecularity=3, order = 3

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions