MHT CET 2024 10th May Morning Shift | Chemical Kinetics Question 19 | Chemistry

For a zero order reaction, $\mathrm{A} \longrightarrow$ product, concentration of A decreases from $1.2 \mathrm{~mol~dm}^{-3}$ to $0.4 \mathrm{~mol~dm}^{-3}$ in 240 second. What is rate constant of the reaction?

$0.1 \mathrm{~mol} \mathrm{~dm}^{-3}$ minute $^{-1}$

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

$0.3 \mathrm{~mol} \mathrm{~dm}^{-3}$ minute $^{-1}$

$0.4 \mathrm{~mol} \mathrm{~dm}^{-3}$ minute $^{-1}$

MHT CET 2024 10th May Morning Shift

MCQ (Single Correct Answer)

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Which of the following is NOT true about order of a reaction?

It is sum of power of concentration terms in rate law equation.

It may be integer, fraction or zero.

It is theoretical quantity

It is experimentally determined quantity.

MHT CET 2024 10th May Morning Shift

MCQ (Single Correct Answer)

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Calculate rate constant of first order reaction if concentration of reactant decreases by $90 \%$ in 30 minute?

$2.16 \times 10^{-2} \mathrm{~min}^{-1}$

$3.52 \times 10^{-2} \mathrm{~min}^{-1}$

$4.81 \times 10^{-2} \mathrm{~min}^{-1}$

$ 7.67 \times 10^{-2} \mathrm{~min}^{-1}$

MHT CET 2024 9th May Evening Shift

MCQ (Single Correct Answer)

-0

The reaction $2 \mathrm{~A}+\mathrm{B}+\mathrm{C} \longrightarrow \mathrm{D}+\mathrm{E}$ is found to be first order in A , second order in B and zero order in C . What is the effect of increasing concentration of all reactants twice?

Rate of reaction increases 8 times.

Rate of reaction increases 24 times.

Rate of reaction increases 36 times.

Rate of reaction remains unaffected.

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