Question 17

Compounds ‘A’ and ‘B’ react according to the following chemical equation. A (g) + 2 B (g) → 2C (g) Concentration of either ‘A’ or ‘B’ were 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. Experiment Initial Initial Initial rate of concentration concentration formation of –1 –1 –1 –1 of [A]/mol L of [B]/mol L [C]/mol L s 1. 0.30 0.30 0.10 2. 0.30 0.60 0.40 3. 0.60 0.30 0.20

• (i)Rate = k [A]2 [B]
• (ii)Rate = k [A] [B]2
• (iii)Rate = k [A] [B]
• (iv)Rate = k [A]2 [B]0 51 Chemical Kinetics