List of top Chemistry Questions on Chemical Kinetics asked in MHT CET

A first order reaction take \(30\) minutes for \(75\%\) decomposition, calculate its rate constant ?

Which of the following is an elementary reaction ?

For a reaction \(\text{A}⟶\) product, \(k = 2\times 10^{-2} \text{s}^{-1}\). If the initial concentration of A is \(1.0 \text{mol dm}^{-3}\) find the value of \(log\frac{1}{[A]_t}\) after 100 second ?

What is the time required for 75 % completion of a first order reaction if rate constant is \(23.03 \text{minute}^{-1}\) ?

In a first order reaction 20 millimole of reactant is lowered to 10 millimole in \(0.3010\) minute. Find rate constant of the reaction?

In first order reaction 20 millimole of reactant is reduced to 10 millimole in \(1\cdot 151\) minute. Find rate constant.

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?

If for a first-order reaction, \([A]_0 = 1.0 \text{M}\) and \([A]_t = 0.25 \text{M}\) after 276 s, find the value of the rate constant (k).

The rate constant of reaction is \(1.5\times 10^7 \text{s}^{-1}\) at 300 K and \(3.0\times 10^7 \text{s}^{-1}\) at 330 K. What is the activation energy for the reaction? [ \(R\times 2.303 = 19.15 \text{JK}^{-1}\text{mol}^{-1}\)]

The time required for \(90\%\) completion of a certain first order reaction is \(1\) hour. Calculate the time required for \(99.9\%\) completion of the same reaction.

A first order reaction takes \(16\) minutes for it's \(50\%\) completion. What fraction that would react in \(32\) minutes from the beginning?

In first order reaction, 20 % concentration remains after 10 min. What would be the rate constant of reaction if \(log_{10}(5) = 0.6989\)?

The half life of first order reaction is \(850\) s. The initial concentration of the reactant is \(0.06\) mol \(\text{dm}^{-3}\). What concentration would remain after \(1200\) s ?

Which of the following statements is NOT true about the rate constant?

A first order reaction complete \(60\)% in \(20\) minutes. How long will the reaction take to complete \(84\)%?

The rate constant for a first order reaction is \(60\text{ s}^{-1}\). How much time will it take to reduce the concentration of the reactant to \(1/20^{\text{th}}\) of its initial value?

What is the time required for 99% completion of a first order reaction if rate constant is 23.03 min$^{-1}$?

If instantaneous rate of reaction is stated as $-\frac{1}{2} \frac{d[x]}{dt} = -\frac{d[y]}{dt} = \frac{1}{2} \frac{d[z]}{dt}$, identify the reaction.

Calculate rate constant of a first order reaction having pre-exponential factor $1.6\times10^{-13}\text{s}^{-1}$. ($E_{a}/2.303RT=21$)}

Rate of the reaction $\text{A}+\text{B}\rightarrow$ product is $3.6\times10^{-2}\text{ mol dm}^{-3}\text{s}^{-1}$ and rate law is $r=k[\text{A}][\text{B}]^{2}$. What is rate constant of the reaction if $[\text{A}]=0.2$ M and $[\text{B}]=0.1$ M?

What is the volume occupied by \(0.5\text{ mol}\) of \(\text{CO}_2\) at STP?

Identify secondary amine from following.

What is the number of node in 2s orbital?

Find the mass of potassium chlorate required to liberate $5.6 \text{ dm}^3$ of oxygen gas at STP? (molar mass of $\text{KClO}_3 = 122.5\text{ g/mol}$ )}

Rate law for the reaction,
$\text{C}_2\text{H}_5\text{I}_{(g)} \longrightarrow \text{C}_2\text{H}_{4(g)} + \text{HI}_{(g)}$ is $\text{r} = \text{k} [\text{C}_2\text{H}_5\text{I}]$
What is the order and molecularity of this reaction?