For the reaction, H 2(g)+ Br 2(g) longrightarrow 2 HBr (g) the reaction rate is given by r=k[ H 2][ Br 2]1 / 2. Which of the following statements are true? I. Molecularity of reaction is 1.5. II. Order of reaction is 2 . III. Molecularity of reaction is 2 . IV. Order of reaction is 1.5. Choose the correct option.

Question

For the reaction, H 2(g)+ Br 2(g) longrightarrow 2 HBr (g) the reaction rate is given by r=k[ H 2][ Br 2]1 / 2. Which of the following statements are true? I. Molecularity of reaction is 1.5. II. Order of reaction is 2 . III. Molecularity of reaction is 2 . IV. Order of reaction is 1.5. Choose the correct option. (A) I and III (B) I and II (C) II and III (D) III and IV

Tardigrade Admin · Accepted Answer

H 2(g)+ Br 2(g) longrightarrow 2 HBr (g) rate =k[ H 2][ Br 2]1 / 2, molecularity =2 Order =1+(1/2)=(3/2)

$I$ and $III$

$I$ and $II$

$II$ and $III$

$III$ and $I V$

$H_{2} (g) + B r_{2} (g) ⟶ 2 H B r (g)$
rate $= k [H_{2}] [B r_{2}]^{1/2},$ molecularity $= 2$
Order $= 1 + \frac{1}{2} = \frac{3}{2}$

I and III

I and II

II and III

III and IV

H2​(g)+Br2​(g)⟶2HBr(g) rate =k[H2​][Br2​]1/2, molecularity =2 Order =1+21​=23​

$I$ and $III$

$I$ and $II$

$II$ and $III$

$III$ and $I V$

$H_{2} (g) + B r_{2} (g) ⟶ 2 H B r (g)$
rate $= k [H_{2}] [B r_{2}]^{1/2},$ molecularity $= 2$
Order $= 1 + \frac{1}{2} = \frac{3}{2}$