A reaction proceeds via a two-step mechanism. The first step is a fast, reversible equilibrium with a small equilibrium constant. The second step is slow. Which of the following is MOST likely true about the overall reaction rate?

The slope of Arrhenius plot $\left( {\ln \,k\,{\rm{v/s}}\frac{1}{T}} \right)$ of first order reaction is $- 5 imes {10^3}K.$ The value of ${E_a}$ of the reaction is. Choose the correct option for your answer. [Given $R = 8.314{\rm{ J}}{{\rm{K}}^{ - 1}}{\rm{ mo}}{{\rm{l}}^{ - 1}}$]

Which increases on increase of temperature?

If $X$ is the total number of collisions which a gas molecule register with others per unit time under particular conditions, then the collision frequency of the gas containing $N$ molecules per unit volume is

Consider an endothermic reaction $X o Y$ with the activation energies ${E_b}\;{\rm{and}}\;{E_f}$ for the backward and forward reactions respectively. In general

A reaction's Arrhenius plot exhibits a slope of $-9 imes 10^3 \ K$. Calculate the activation energy ($E_a$) of this reaction, using $R = 8.314 \ \rm{J} \ {\rm{K}}^{-1} \rm{mol}^{-1}$.

For an endothermic reaction where, $\Delta H$ represents the enthalpy of the reaction in $kJ/mol,$ the minimum value for the energy of activation will be

The rate of reaction increases with temperature due to

An endothermic reaction A→B has an activation energy as $x\;{\rm{kg}}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$ of $A$. If energy change of the reaction is $y\;{\rm{kJ}},$ the activation energy of the reverse reactions is

The slope of the Arrhenius plot $\left( \ln k \ \rm{v/s} \frac{1}{T} \right)$ of a first-order reaction is $-7 imes 10^3 \ K$. The value of $E_a$ of the reaction is (Given $R = 8.314 \ \rm{J} \ {\rm{K}}^{-1} \rm{mol}^{-1}$). Choose the correct option.

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : Some reactions can occur without any activation energy.

Reason R : Activation energy is the minimum extra amount of energy absorbed by reactant molecules so that their energy becomes equal to the threshold value.

In the light of the above statements, choose the correct answer from the options given below: