Question

For a reaction that proceeds by the following two-step mechanism

A₂ ⇄ 2A (fast)

A + B → C (slow)

Which of the following statements is/are correct?

1)   The reaction is first order in the concentration of A₂.

2)   B is a reaction intermediate.

3)   The rate-determining step is bimolecular.

4)   The units of the specific rate constant are mol^1/2L^-1/2s^-1

Answer 1

Kes. A A+B 2A Kiy t fast) I slow) Ky be eluilibchan constant and ky be rate constant of slow step we know rate depends on clow stop, hence hare determining step is bindlecular es 2 molecules are involved so statement (3) is correct. Repute of reaction in rate = K[ASB keq, is written as Ker= LAI tar] => [A] = f keq, [A] but in above stefuation Salute - K, Skea [AZ] 2 [B] = K [A] 2 [B7 - A for unit of k mallista k {nual 1-17 12 [muala-l] => unit of ke med 12, 123,