The rate of the reaction H2g-Br2g- 2HBrg is given by- r-k-H2-Br2-1-2Which among the following is correct-

The correct option is D Order of reaction is 1.5Molecularity is the number of reacting #160;species (atoms, ions or molecules #160;) taking part in an elem ...

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Standard XII

Chemistry

Order of Reaction

The rate of t...

Question

The rate of the reaction $H_{2} (g) + B r_{2} (g) \to 2 H B r (g)$ is given by:
$r = k [H_{2}] [B r_{2}]^{1 / 2}$
Which among the following is correct?

Order of reaction is 2

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Molecularity of reaction is 2

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Order of reaction is 1.5

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Molecularity of reaction is 2.5

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Solution

The correct option is D Order of reaction is 1.5
Molecularity is the number of reacting species (atoms, ions or molecules ) taking part in an elementary reaction.
Since this is not an elementary reaction ( as can be seen from order of reaction) molecularity cannot be predicted until we know the mechanism.
$H_{2} + B r_{2} \to 2 H B r$
Order $= 1 + \frac{1}{2} = \frac{3}{2}$

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Similar questions

Q. For the reaction,

H_{2} (g) + B r_{2} (g) = 2 H B r (g)

, the reaction

r a t e = K [H_{2}] [B r_{2}]^{1 / 2}

. Which statement is true about this reaction?

Q. For the reaction,

H_{2} (g) + B r_{2} (g) \to 2 H B r (g)

, then reaction

r a t e = K [H_{2}] [B r_{2}]^{1 / 2}

. Which statement is true about this reaction :

Q. For the reaction,

H_{2} (g) + {B r}_{2} (g) \to 2 H B r (g)

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Rate

= k [H_{2}] {[{B r}_{2}]}^{1 / 2}

Which one of the following statement(s) is/are false for this reaction?

Q. For the reaction

H_{2} (g) + B r_{2} (g) \to 2 H B r (g)

, the experiment data suggested that

r = k [H_{2}] [B r_{2}]^{1 / 2}

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Q. Consider the following gas phase reaction:

H_{2} (g) + B r_{2} (g) ⇌ 2 H B r (g)

The concentrations of

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The rate of the reaction H2(g)+Br2(g)→2HBr(g) is given by: r=k[H2][Br2]1/2Which among the following is correct?

The rate of the reaction $H_{2} (g) + B r_{2} (g) \to 2 H B r (g)$ is given by:
$r = k [H_{2}] [B r_{2}]^{1 / 2}$
Which among the following is correct?