Chemical Kinetics

Activation energy of any chemical reaction can be calculated if one knows the value of

[NEET 2024]

Activation energy of any chemical reaction can be calculated if one knows the value of

[NEET 2024]

Rate constants of a reaction at \(500 K\) and \(700 K\) are \(0.04 s ^{-1}\) and \(0.14 s ^{-1}\), respectively; then, activation energy of the reaction is
(Given : \(\log 3.5=0.5441, R =8.31 J K ^{-1} mol ^{-1}\) )

[Re-NEET 2024]

If the half-life \(\left({t}_{1/2}\right)\) for a first order reaction is 1 minute, then the time required for \(99.9 \%\) completion of the reaction is closest to

[NEET 2025]

The rate of a reaction quadruples when temperature changes from \(27^\circ C\) to \(57^\circ C\). Calculate the energy of activation.
Given \(R=8.314J{K}^{-1}mo{l}^{-1},\log 4=0.6021\)

[NEET 2024]

The rate of a reaction quadruples when temperature changes from \(27^\circ C\) to \(57^\circ C\). Calculate the energy of activation.
Given \(R=8.314J{K}^{-1}mo{l}^{-1},\log 4=0.6021\)

[NEET 2024]

An increase in the concentration of the reactants of a reaction leads to change in

[NEET 2020]

Given below are two statements: one is labelled as Assertion \(\mathbf{A}\) and the other is labelled as Reason R.
Assertion A : A reaction can have zero activation energy.
Reasons R : The minimum extra amount of energy absorbed by reactant molecules so that their energy becomes equal to threshold value, is called activation energy.
In the light of the above statements, choose the correct answer from the options given below :

[NEET 2023]

The half-life for a zero order reaction having \(0.02\mathrm{M}\) initial concentration of reactant is 100 s. The rate constant (in \({\mathrm{molL}}^{-1}{\mathrm{s}}^{-1}\) ) for the reaction is

[Re-NEET 2020]

The rate constant for a first order reaction is \( 4.606 \times 10^{-3} \mathrm{~s}^{-1} \). The time required to reduce \( 2.0 \mathrm{~g} \) of the reactant to \( 0.2 \mathrm{~g} \) is:

[NEET-2020]

In collision theory of chemical reaction, \({\mathrm{Z}}_{\mathrm{AB}}\) represents

[NEET 2020]

For conversion of compound \(A\to B\), the rate constant of the reaction was found to be \(4.6\times {10}^{-5}Lmo{l}^{-1}{s}^{-1}\) . The order of the reaction is _______.

The slope of Arrhenius Plot (ln \( \mathrm{K} \mathrm{~v} / \mathrm{s} \) 1/T) of first order reaction is \( -5 \times 10^{3} \mathrm{~K} \). The value of \( \mathrm{E}_{\mathrm{a}} \) of the reaction is.

[Given \( \mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1} \) ]

[NEET 2021]