MHT CET 2026 17th April Morning Shift | Chemical Kinetics Question 24 | Chemistry

If time required for 90 % completion of a first order reaction is '$t$'. What is the time required for 99.9 % completion of reaction at same temperature?

$3t$

$2t$

$t$

$\dfrac{3t}{2}$

MHT CET 2025 5th May Evening Shift

MCQ (Single Correct Answer)

-0

Which of the following statements is NOT correct regarding order of reaction?

It is determined experimentally.

It is not influenced by stoichiometric coefficient of reactants.

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

It is always whole number.

MHT CET 2025 5th May Evening Shift

MCQ (Single Correct Answer)

-0

What is half life of a first order reaction if time required to decrease concentration of reactant from 0.4 M to 0.1 M is $x$ hour?

$x$ hour

$2 x$ hour

$\frac{x}{2}$ hour

$\frac{3 x}{2}$ hour

MHT CET 2025 5th May Evening Shift

MCQ (Single Correct Answer)

-0

For the reaction,

$$ 2 \mathrm{~N}_2 \mathrm{O}_{5(\mathrm{~g})} \longrightarrow 4 \mathrm{NO}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})} $$

$\mathrm{N}_2 \mathrm{O}_5$ disappears at a rate of $x \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}$

Find the rate of formation of $\mathrm{O}_2$ ?

$\quad x \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}$

$2 x \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}$

$\frac{x}{2} \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}$

$\frac{3 x}{2} \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}$

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Some Basic Concepts of Chemistry Atomic Structure States of Matter Thermodynamics Chemical Equilibrium Ionic Equilibrium Liquid Solution Redox Reactions Surface Chemistry Solid State Electrochemistry Chemical Kinetics Nuclear Chemistry

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