What is the molecularity of the following elementary reaction?

nh2cl(aq) + oh-(aq) > nhcl-(aq) + h2o(l)

a) unimolecular

b) bimolecular

c) termolecular

d) tetramolecular

e) the reaction order must be known before molecularity can be determined.

Answer : The correct option is, (B) bimolecular

Explanation :

Molecularity : It is defined as the total number of reactant molecules taking part in the balanced equation of a reaction. It is a theoretical concept.

The given balanced chemical reaction is,

The number of reactants molecules taking part in the balanced equation of a reaction are, and .

In this reaction, 1 molecules reacts with the 1 molecule.

Total number of reactant molecule = 1 + 1 = 2

The molecularity of the reaction is 2 that means, the elementary reaction is bimolecular.

Hence, the correct option is, (B) bimolecular

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.