Question

Which among the following is a false statement?

Options

• Rate of zero order reaction is independent of initial concentration of reactant.

• Half-life of a zero order reaction is inversely proportional to the rate constant.

• Molecularity of a reaction may be zero.

• For a first order reaction, t_1/2 = 0.693/k.

Answer 1

Molecularity of a reaction may be zero.

Explanation:

Molecularity refers to the number of reacting species that take part in a single, elementary (simplest) reaction step through simultaneous collisions. As a reaction must involve at least one reacting molecule, the minimum possible molecularity is one. Therefore, the molecularity of any reaction can never be zero.