List of top Chemistry Questions on Chemical Kinetics asked in UP Board XII

The unit of rate and rate constant is same for which order of reaction?

Discuss the factors that affect the velocity (rate) of a chemical reaction.

The velocity constant \(K\) for a first order reaction was found to be \(5.5 \times 10^{-14}\,s^{-1}\). Calculate the half life of this reaction.

The velocity (rate) constant of a second order reaction is generally expressed as:

The order of reaction for which the unit of the velocity (rate) constant is \(mol\,L^{-1}\,s^{-1}\) is:

What is the order of reaction? Derive the integrated rate equation for a first order reaction and obtain an expression for the half life period of this reaction. (1+2+1=4)

Describe the effect of concentration and temperature on the rate of chemical reaction. Rate constant K = 5.5 × 10⁻¹⁴ s⁻¹ for a first order reaction. Calculate the half life time of this reaction.

Derive the integrated rate equation for first order reaction. Show that half life period for this reaction does not depend on initial concentration of the reactants. (2+1=3)

A first order reaction takes 10 min for 20% decomposition. Calculate the time taken for the reaction to go to 80% decomposition. (Given, \( \log_{10}2 = 0.3010 \))

For the first-order reaction \(N_2O_5(g) \rightarrow 2NO_2(g) + O_2(g)\), the initial concentration of \(N_2O_5\) at 318 K was \(1.24 \times 10^{-2}\) mol L^-1, which decreased to \(0.20 \times 10^{-2}\) mol L^-1 after 60 minutes. Calculate the rate constant at 318 K.

Unit of rate constant of a first order reaction is —

The unit of rate constant of a zero order reaction is —

Explain first order reaction with example.

Differentiate between order and molecularity of a reaction.

The rate constants of a certain reaction at 500 K and 700 K are 0.02 sec^-1 and 0.07 sec^-1 respectively. Calculate \( E_a \) and \( A \). (2+2)

The rate constant for a first order reaction is 60 sec\(^{-1}\). How much time will it take for the reactant to reduce to 1/16th of its initial concentration?

Explain molecularity and order of a reaction with the help of an example.

Explain whether the half-life of a first order reaction depends or not on the initial concentration of the reactants.

Rate constant \( K \) for a first order reaction is found \( 5.5 \times 10^{-14}\ \text{s}^{-1} \). Calculate the half-life of this reaction.
OR
For the following first order reaction — \( N_2O_5(g) \rightarrow 2NO_2(g) + \tfrac{1}{2}O_2(g) \) — the initial concentration of \( N_2O_5 \) at 318 K was \( 1.24 \times 10^{-2}\ \text{mol L}^{-1} \). After 60 min it became \( 0.20 \times 10^{-2}\ \text{mol L}^{-1} \). Calculate the rate constant at 318 K.

Write the effect of catalyst on the rate of reaction.

Does the half-life of a first-order reaction depend on the initial concentration of the reaction? Explain.

If the rate law of a reaction is Rate $= K[A]^2 [B]^0$, then what will be the order of the reaction?