Question

in the reaction h2+cl2​

Answer 1

Answer:

ANSWER

Order of a reaction: Order of a reaction is sum of the powers to which the concentration (pressure) terms are raised in the rate- law expression.

Molecularity of a reaction: It is defined as the number of molecules involved in the step leading to the chemical reaction.

Given reaction is:-

H

2

+Cl

2

hv

2HCl

& Rate=K

Since the rate of the reaction is independent of the concentration of reactants, so it is a zero order reaction.

Now, No. of molecules involved in the reaction is=2

(One molecule of each of the reactants i.e. H

2

& Cl

2

)

So, as per definition,

Molecularity of the reaction is 2.

Now, [∵] Rate=K (given)

So, a unit of K will be the same as the rate of the reaction, i.e., a unit of K is molL

−1

s

−1

Answer 2

Answer:

H2 + Cl2 ----------> 2HCl