MHT CET 2024 16th May Evening Shift | Chemical Kinetics Question 3 | Chemistry

$$\mathrm{H}_{2(g)}+\mathrm{Br}_{2(8)} \longrightarrow 2 \mathrm{HBr}_{(\mathrm{g})}, \mathrm{r}=\mathrm{k}\left[\mathrm{H}_2\right]\left[\mathrm{Br}_2\right]^{\frac{1}{2}}$$

What is the molecularity and order of reaction respectively?

Monomolecular and $\frac{1}{2}$

Monomolecular and 1

Monomolecular and $\frac{3}{2}$

Bimolecular and $\frac{3}{2}$

MHT CET 2024 16th May Morning Shift

MCQ (Single Correct Answer)

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Which of the following is true for a reaction as per coliision theory?

Every collision between reactants leads to chemical reaction.

It may be expected that rate of reaction is equal to rate of collision.

For gas phase reactions, the number of collisions is far less compared to observed rate.

The colliding molecules do not need proper orientation.

MHT CET 2024 16th May Morning Shift

MCQ (Single Correct Answer)

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Rate of reaction, $\mathrm{A}+\mathrm{B} \rightarrow$ product, is $7.2 \times 10^{-2} \mathrm{moldm}^{-3} \mathrm{~s}^{-1}$ at $[\mathrm{A}]=0.4 \mathrm{~mol} \mathrm{dm}^{-3}$ and $[B]=0.1 \mathrm{~mol} \mathrm{dm}^{-3}$. The reaction is first order in A and second order in B. Calculate rate constant.

$14 \mathrm{~mol}^{-2} \mathrm{dm}^6 \mathrm{~s}^{-1}$

$12 \mathrm{~mol}^{-2} \mathrm{dm}^6 \mathrm{~s}^{-1}$

$18 \mathrm{~mol}^{-2} \mathrm{dm}^6 \mathrm{~s}^{-1}$

$20 \mathrm{~mol}^{-2} \mathrm{dm}^6 \mathrm{~s}^{-1}$

MHT CET 2024 16th May Morning Shift

MCQ (Single Correct Answer)

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A zero order reaction has half life time of 0.2 minute. If initial concentration of reactant is $0.2 \mathrm{~mol} \mathrm{dm}^{-3}$. Find rate constant.

$0.2 \mathrm{~mol}^{-1} \mathrm{dm}^3 \mathrm{~min}^{-1}$

$0.5 \mathrm{~mol}^{-1} \mathrm{dm}^3 \mathrm{~min}^{-1}$

$1.4 \mathrm{~mol}^{-1} \mathrm{dm}^3 \mathrm{~min}^{-1}$

$6.0 \mathrm{~mol}^{-1} \mathrm{dm}^3 \mathrm{~min}^{-1}$

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