Compounds ‘A’ and ‘B’ react according to

Compounds ‘A’ and ‘B’ react according to the following chemical equation.

A (g) + 2 B (g) → 2C (g)

The concentration of either ‘A’ or ‘B’ was changed keeping the concentrations of

one of the reactants constant and rates were measured as a function of initial

concentration. Following results were obtained. Choose the correct option for

the rate equations for this reaction.

(i) Rate = k [A]2[B]

(ii) Rate = k [A] [B]2

(iii) Rate = k [A] [B]

(iv) Rate = k [A]2[B]0