# Chemical Kinetics · Chemistry · MHT CET

Start Practice## MCQ (Single Correct Answer)

MHT CET 2023 14th May Evening Shift

Calculate the rate constant of the first order reaction if $$80 \%$$ of the reactant decomposes in 60 minutes.

MHT CET 2023 14th May Evening Shift

What is the value of rate constant for first order reaction if slope for the graph of rate versus concentration is $$2.5 \times 10^{-3}$$ ?

MHT CET 2023 14th May Evening Shift

The rate law for the reaction $$\mathrm{A}+\mathrm{B} \rightarrow$$ product is rate $$=\mathrm{k}[\mathrm{A}][\mathrm{B}]$$. When will the rate of rea...

MHT CET 2023 14th May Morning Shift

Find the rate law for the reaction, $$\mathrm{CHCl}_{3(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})} \rightarrow \mathrm{CCl}_{4(\mathrm{~g})}+\mathrm{HC...

MHT CET 2023 14th May Morning Shift

The rate for reaction $$2 \mathrm{~A}+\mathrm{B} \rightarrow$$ product is $$6 \times 10^{-4} \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$$ Calcul...

MHT CET 2023 14th May Morning Shift

Calculate half life of first order reaction if rate constant of reaction is $$2.772 \times 10^{-3} \mathrm{~s}^{-1}$$

MHT CET 2023 13th May Evening Shift

Which from following statements about rate constant is NOT true?

MHT CET 2023 13th May Evening Shift

For the reaction,
$$\mathrm{CH}_3 \mathrm{Br}(a q)+\mathrm{OH}^{-}(a q) \longrightarrow \mathrm{CH}_3 \mathrm{OH}(a q)+\mathrm{Br}^{-}(a q),$$
The ra...

MHT CET 2023 13th May Evening Shift

For the reaction, $$2 A+2 B \longrightarrow 2 C+D$$, the rate law is expressed as rate $$=k[A]^2[B]$$.
Calculate the rate constant if rate of reaction...

MHT CET 2023 13th May Morning Shift

Find the rate of formation of $$\mathrm{NO}_{2(\mathrm{~g})}$$ in the following reaction.
$$\begin{aligned}
& 2 \mathrm{~N}_2 \mathrm{O}_{5(\mathrm{~g...

MHT CET 2023 13th May Morning Shift

Calculate the rate constant of the first order reaction if $$20 \%$$ of the reactant decomposes in 15 minutes.

MHT CET 2023 13th May Morning Shift

Which from following is the slope of the graph of $$[\mathrm{A}]_{\mathrm{t}}$$ versus time for zero order reaction?

MHT CET 2023 12th May Evening Shift

A first order reaction takes 23.03 minutes for $$20 \%$$ decomposition. Calculate its rate constant.

MHT CET 2023 12th May Evening Shift

The rate law for the reaction $$\mathrm{A}+\mathrm{B} \rightarrow \mathrm{C}$$ at $$25^{\circ} \mathrm{C}$$ is given by rate $$=k[A][B]^2$$. Calculate...

MHT CET 2023 12th May Morning Shift

Calculate the time needed for reactant to decompose $$99.9 \%$$ if rate constant of first order reaction is 0.576 minute$$^{-1}$$.

MHT CET 2023 12th May Morning Shift

Calculate the rate constant of first order reaction if half life of reaction is 40 minutes.

MHT CET 2023 12th May Morning Shift

Identify rate law expression for $$2 \mathrm{NO}_{(\mathrm{g})}+\mathrm{Cl}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{NOCl}_{(\mathrm{g})}$$ if the react...

MHT CET 2023 11th May Evening Shift

For a reaction $$\mathrm{A}+\mathrm{B} \rightarrow$$ product, if $$[\mathrm{A}]$$ is doubled keeping $$[\mathrm{B}]$$ constant, the rate of reaction d...

MHT CET 2023 11th May Evening Shift

Calculate the rate constant of the first order reaction if $$80 \%$$ of the reactant reacted in 15 minute.

MHT CET 2023 11th May Evening Shift

Identify the expression for average rate for following reaction.
$$\mathrm{N}_{2(\mathrm{~g})}+3 \mathrm{H}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{NH}...

MHT CET 2023 11th May Morning Shift

For an elementary reaction
$$2 \mathrm{~A}+\mathrm{B} \longrightarrow 3 \mathrm{C}$$
rate of appearance of $$\mathrm{C}$$ is $$1.3 \times 10^{-4} \mat...

MHT CET 2023 11th May Morning Shift

Slope of the graph between $$\log \frac{[\mathrm{A}]_0}{[\mathrm{~A}]_{\mathrm{t}}}$$ (y axis) and time ( $$x$$ axis) for first order reaction is equa...

MHT CET 2023 11th May Morning Shift

What is half life time of a first order reaction if initial conc. of reactant is $$0.01 \mathrm{~mol} \mathrm{~L}^{-1}$$ and rate of reaction is $$0.0...

MHT CET 2023 10th May Evening Shift

Find the average rate of formation of $$\mathrm{NO}_{2(\mathrm{~g})}$$, in following reaction.
$$\begin{aligned}
& 2 \mathrm{~N}_2 \mathrm{O}_{5(\math...

MHT CET 2023 10th May Evening Shift

Calculate the rate constant for the first order reaction, $$\mathrm{A} \rightarrow \mathrm{B}$$ if the rate of reaction is $$5.4 \times 10^{-6} \mathr...

MHT CET 2023 10th May Evening Shift

Time required for $$90 \%$$ completion of a first order reaction is '$$x$$' minute. Calculate the time required to complete $$99.9 \%$$ of the reactio...

MHT CET 2023 10th May Morning Shift

For the reaction, $$3 \mathrm{~I}+\mathrm{S}_2 \mathrm{O}_8^{2-} \rightarrow \mathrm{I}_3^{-}+2 \mathrm{SO}_4^{2-}$$, at a particular time $$\mathrm{t...

MHT CET 2023 10th May Morning Shift

What is the half life of a first order reaction if rate constant is $$4.2 \times 10^{-2}$$ per day?

MHT CET 2023 10th May Morning Shift

The reaction, $$3 \mathrm{ClO}^{-} \rightarrow \mathrm{ClO}_3^{-}+2 \mathrm{Cl}^{-}$$ occurs in two steps:
i. $$\quad 2 \mathrm{ClO}^{-} \rightarrow \...

MHT CET 2023 9th May Evening Shift

Calculate the rate constant of first order reaction if the concentration of the reactant decreases by $$90 \%$$ in 30 minutes.

MHT CET 2023 9th May Evening Shift

The rate law for the reaction $$\mathrm{A}+\mathrm{B} \rightarrow$$ product is given by rate $$=k[A][B]$$ Calculate $$[A]$$ if rate of reaction and ra...

MHT CET 2023 9th May Evening Shift

Find the average rate of formation $$\mathrm{O}_{2(\mathrm{~g})}$$ in the following reaction.
$$\begin{aligned}
& 2 \mathrm{NO}_{2(\mathrm{~g})} \righ...

MHT CET 2023 9th May Morning Shift

Which from following is the slope of the graph of rate versus concentration of the reactant for first order reaction?

MHT CET 2023 9th May Morning Shift

Calculate the amount of reactant in percent that remains after 60 minutes involved in first order reaction. $$\left(\mathrm{k}=0.02303\right.$$ minute...

MHT CET 2023 9th May Morning Shift

The rate for reaction $$\mathrm{A}+\mathrm{B} \rightarrow$$ product, is $$1.8 \times 10^{-2} \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$$. Calcu...

MHT CET 2022 11th August Evening Shift

For the reaction $$\mathrm{N}_{2(\mathrm{~g})}+3 \mathrm{H}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{NH}_{3(\mathrm{~g})}$$, rate of disappearance of $$...

MHT CET 2022 11th August Evening Shift

Find the rate constant of first order reaction in second having half life of 2.5 hours.

MHT CET 2022 11th August Evening Shift

If rate of reaction is given as
$$\frac{1}{3} \frac{\mathrm{d}[\mathrm{x}]}{\mathrm{dt}}=-\frac{1}{2} \frac{\mathrm{d}[\mathrm{y}]}{\mathrm{dt}}=-\fra...

MHT CET 2021 24th September Evening Shift

In a first reaction 60% of reactant decomposes in 4.606 min. What is half life of reaction? (k = 0.1989 min$$^{-1}$$)

MHT CET 2021 24th September Evening Shift

For the reaction, $$2 \mathrm{~A}+\mathrm{B} \rightarrow 2 \mathrm{C}$$, rate of disappearance of $$\mathrm{A}$$ is $$0.076 \mathrm{~mol} \mathrm{~s}^...

MHT CET 2021 24th September Evening Shift

Half-life and rate constant for first order reaction are related by equation,

MHT CET 2021 24th September Morning Shift

If decomposition of hydrogen peroxide is a first order reaction, it's rate law equation can be represented as

MHT CET 2021 24th September Morning Shift

A reaction is first order with respective to $$\mathrm{A}$$ and second order with respective to $$\mathrm{B}$$. What is the effect on reaction rate if...

MHT CET 2021 24th September Morning Shift

For the reaction $$\mathrm{A}+\mathrm{B} \rightarrow$$ product, rate of reaction is $$3.6 \times 10^{-2} \mathrm{mol~dm}^{-3} \mathrm{sec}^{-1}$$. Whe...

MHT CET 2021 23rd September Evening Shift

Which of the following equations represents integrated rate law for zero order reaction?

MHT CET 2021 23rd September Evening Shift

Ammonia and oxygen react at high temperature as
$$4 \mathrm{NH}_{3(\mathrm{~g})}+5 \mathrm{O}_{2(\mathrm{~g})} \longrightarrow 4 \mathrm{NO}_{(\mathrm...

MHT CET 2021 23rd September Evening Shift

Which of the following represents integrated rate law equation for gas phase first order reaction, $$\mathrm{A}_{(\mathrm{g})} \rightarrow \mathrm{B}_...

MHT CET 2021 23th September Morning Shift

The rate law equation for a reaction between $$\mathrm{A}, \mathrm{B}$$ and $$\mathrm{C}$$ is $$\mathrm{r}=\mathrm{k}[\mathrm{A}][\mathrm{B}][\mathrm{...

MHT CET 2021 23th September Morning Shift

Time required for $$90 \%$$ completion of a first order reaction is $$t$$. What is the time required for completion of $$99 \%$$ reaction?

MHT CET 2021 23th September Morning Shift

The order of reaction for which the units of rate constant are $$\mathrm{mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$$ is

MHT CET 2021 22th September Evening Shift

What is rate constant of a first order reaction if 0.08 mole of reactant reduces to 0.02 mole in 23.03 minute?

MHT CET 2021 22th September Evening Shift

Which of the following statements is NOT true for a reaction having rate law $$\mathrm{r}=\mathrm{k}\left[\mathrm{H}_2\right]\left[\mathrm{I}_2\right]...

MHT CET 2021 22th September Evening Shift

For the reaction $$\mathrm{N}_{2(\mathrm{~g})}+3 \mathrm{H}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{NH}_{3(\mathrm{~g})}$$,
what is the relation betwee...

MHT CET 2021 22th September Morning Shift

For a reaction $$\mathrm{A} \rightarrow$$ product, rate constant is $$2 \times 10^{-2} \mathrm{~s}^{-1}$$. The initial concentration of $$\mathrm{A}$$...

MHT CET 2021 22th September Morning Shift

Identify order of reaction if it's rate constant is x sec$$^{-1}$$.

MHT CET 2021 22th September Morning Shift

For the reaction $$2 \mathrm{~A}+2 \mathrm{~B} \rightarrow 2 \mathrm{C}+\mathrm{D}$$ if $$\mathrm{r}=\mathrm{k}[\mathrm{A}]^2[\mathrm{~B}]^0$$, then r...

MHT CET 2021 21th September Evening Shift

For a first order reaction, intercept of the graph between $$\mathrm{\log\frac{[A]_o}{[A]_t}}$$(Y-axis) and conc. (X-axis) is equal to

MHT CET 2021 21th September Evening Shift

What is the half-life of a first order reaction if time required to decrease concentration of reactant from 1.0 M to 0.25 M is 10 hour?

MHT CET 2021 21th September Evening Shift

What is the rate of disappearance of B in following reaction? $$2 \mathrm{A}+\mathrm{B} \rightarrow 3 \mathrm{C}$$, if rate of appearance of $$\mathrm...

MHT CET 2021 21th September Morning Shift

What is the rate of appearance of $$\mathrm{Z}$$ in following reaction? $$3 \mathrm{x} \rightarrow 2 \mathrm{y}+\mathrm{z}$$, if rate of disappearance...

MHT CET 2021 21th September Morning Shift

Slope of the graph between rate ( $$\mathrm{Y}$$-axis) and $$[\mathrm{A}](\mathrm{X}$$-axis) for the first order reaction is equal to

MHT CET 2021 21th September Morning Shift

In a first order reaction, concentration of reactant is reduced to (1/8)th of concentration in 23.03 minutes. What is half-life period of reaction?...

MHT CET 2021 20th September Evening Shift

For the reaction $$2 \mathrm{NO}+\mathrm{Cl}_2 \rightarrow 2 \mathrm{NOCl}$$
What is the relation between $$\frac{\mathrm{d}[\mathrm{NO}]}{\mathrm{dt}...

MHT CET 2021 20th September Evening Shift

In a first order reaction concentration of reactant decreases from 20 m mol to 10 m mol in 1.151 min. What is rate constant?

MHT CET 2021 20th September Evening Shift

Which type of reaction order is followed by radioactive processes?

MHT CET 2021 20th September Morning Shift

For the reaction, $$3 \mathrm{I}_{(\mathrm{aq})}^{-}+\mathrm{S}_2 \mathrm{O}_{8(\mathrm{aq})}^{2-} \longrightarrow \mathrm{I}_{3(\mathrm{aq})}^{-}+2 \...

MHT CET 2021 20th September Morning Shift

Instantaneous rate of a reaction is $$ - {1 \over 2}{{d[x]} \over {dt}} = - {{d[y]} \over {dt}} = {1 \over 2}{{d[z]} \over {dt}}$$, identify the reac...

MHT CET 2021 20th September Morning Shift

Half life for a first order reaction is 6.93 hour. What is the time required for 80% completion of the reaction?

MHT CET 2020 19th October Evening Shift

For first order reaction the concentration of reactant decreases from 0.2 to 0.1 M in 100 minutes. What is the rate constant of the reaction?

MHT CET 2020 19th October Evening Shift

A first order reaction is $25 \%$ completed in 40 minutes. What is the rate constant $k$ for the reaction?

MHT CET 2020 16th October Evening Shift

A first order reaction has a rate constant 0.00813 min$$^{-1}$$. How long will it take for 60% completion?

MHT CET 2020 16th October Evening Shift

What is the value of rate constant of first order reaction, if it takes 15 minutes for consumption of $$20 \%$$ of reactants?

MHT CET 2020 16th October Morning Shift

If concentration of reactant '$$A$$' is increased by 10 times the rate of reaction becomes 100 times. What is the order of reaction, if rate law is, r...

MHT CET 2020 16th October Morning Shift

A first order reaction has rate constant $$1 \times 10^{-2} \mathrm{~s}^{-1}$$. What time will, it take for $$20 \mathrm{~g}$$ or reactant to reduce t...

MHT CET 2019 2nd May Morning Shift

For the elementary reaction $2 \mathrm{SO}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{SO}_3(g)$, identify the correct among th...

MHT CET 2019 2nd May Morning Shift

Which among the following reaction is an example of a zero order reaction?