Question

The rate constant is numerically the same for three reactions of first, second and third order respectively. Which of the following is correct : (A = reactant) -

• A. If [A] = 1 then r₁ = r₂ = r₃
• B. If [A] < 1 then r₁> r₂> r₃
• C. If [A] > 1 then r₃> r₂> r₁
• D. All the above

Answer 1

Answer: (D)

All the above

Answer 2

\ r₁ = r₂ = r₃ ; if [A] = 1

r₁ < r₂ < r₃ ; if [A] > 1

[Ex. [A] = 2M, r₁ = 2K, r₂ = 4K, r₃ = 8K]

r₁ > r₂ > r₃ ; if [A] < 1

[Ex. [A] = 1/2 M, r₁ = K/2, r₂ = K/4, r₃ = K/8]