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

If the rate constant of a reaction is 0.03 s^-1, how much time does it take for 7.2 mol L^-1 concentration of the reactant to get reduced to 0.9 mol L^-1 ?
(Given: log 2 = 0391)

The rate of a reaction quadruples where temperature cahnges from \(27^\circ \text{C}\) to \(57^\circ \text{C}\) calculate the energy of activation.
Given \(\text{R}\,=\,8.314\,\text{J}\,\text{K}^{-1}\,\text{mol}^{-1}\), \(\text{log}4\,=\,0.6021\)

Which plot of \(ln\,k\) vs \(\displaystyle \frac{1}{T}\) is consistent with Arrhenius equation?

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

For a certain reaction, the rate = k [A]² [B], when the initial concentration of A is tripled keeping concentration of B constant, the initial rate would

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R :
Assertion A : A reaction can have zero activation energy.
Reason R: The minimum extra amount ofenergy absorbed by reactant molecules so that their enengy 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:

The given graph is a representation of kinetics ofa reaction.

The y and x axes for zero and first order reactions,respectively are

For a first order reaction A → Products, initialconcentration of A is 0.1 M, which becomes0.001 M after 5 minutes. Rate constant for thereaction in min^-1 is

For a reaction A → B, enthalpy of reaction is -4.2 kJ mol^-1 and enthalpy of activation is 9.6 kJ mol^-1. The correct potential energy profle for the reaction is shown in option.

The slope of Arrhenius Plot \(\left(\,ln\,k\,v/s\,\frac{1}{T}\right)\) of first order reaction is -5 x 10³ K. The value of E_a of the reaction is. Choose the correct option.
[Given R=8.314 JK^-1mol^-1]

The rate constant for a first order reaction is 4.606 x 10^-3s^-1, The time required to reduce 2.0g of the reactant to 0.2 g is:

If the rate constant for a first order reaction is k, the time (t) required for the completion of 99% of the reaction is given by

When initial concentration of the reactant is doubled, the half-life period of a zero order reaction

The correct difference between first and second order reactions is that

Mechanism of a hypothetical reaction X₂ + Y₂ \(\rightarrow\) 2XY is given below:
(i) X₂ \(\rightarrow\) X + X (fast)
(ii) X + Y₂ \(\rightleftharpoons\) XY + Y (slow)
(iii) X + Y \(\rightarrow\) XY (fast)
The overall order of the reaction will be

A first order reaction has a specific reaction rate of 10^-2 s^-1. How much time will it take for 20 g of the reactant to reduce to 5 g ?

Consider the nitration of benzene using mixed conc . H₂SO₄ and HNO₃ . If a large amount of KHSO₄ is added to the mixture , the rate of nitration will be

The rate of a first - order reaction is 0.04 mol L^-1S^-1 at 10 sec and 0.03 mol L^-1S^-1 at 20 sec after initiation of the reaction . The half - life period of the reaction is

The addition of a catalyst during a chemical reaction alters which of the following quantities ?