Question Answers

The rate constant for the decomposition of hydrocarbons is 2.418×10^−5s^−1 at 546K. If the energy of activation is 179.9 kJ mol^−1, what will be the value of pre−exponential factor? The rate constant for the decomposition of hydrocarbons is 2.418×10^−5s^−1 at 546K. If the energy of activation is 179.9 kJ mol^−1 what will be the value [...]

Show that time required for 99% completion of a reaction is twice the time required to complete 90% of the reaction. Show that time required for 99% completion of a reaction is twice the time required to complete 90% of the reaction. June 4, 2021 Category: Chemistry , NCERT Exemplar Class 12 ,

A first order reaction takes 40 minutes for 30% decomposition, Calculate its half life period. A first order reaction takes 40 minutes for 30% decomposition Calculate its half life period. June 4, 2021 Category: Chemistry , NCERT Exemplar Class 12 ,

The rate constant for a first order reaction is 60s^−1. How much time will it take to reduce the initial concentration of the reactant to its 1/16th value ? The rate constant for a first order reaction is 60s^−1. How much time will it take to reduce the initial concentration of the reactant to its [...]

The half life for radioactive decay of .14C is 5730 years. An archaeological artifact containing wood had only 80% of the .14C found in a living tree. Estimate the age of the sample. The half life for radioactive decay of .14C is 5730 years. An archaeological artifact containing wood had only 80% of the .14C [...]

Calculate the half life of a first order reaction from their rate constants given below: Calculate the half life of a first order reaction from their rate constants given below: June 4, 2021 Category: Chemistry , NCERT Exemplar Class 12 ,

In a reaction between A and B, the initial rate of reaction was measured for different initial concentration of A and B as given below: In a reaction between A and B the initial rate of reaction was measured for different initial concentration of A and B as given below: June 4, 2021 Category: Chemistry [...]

A reaction is first order in A and second order in B i) Write differential rate equation. A reaction is first order in A and second order in B i) Write differential rate equation. June 4, 2021 Category: Chemistry , NCERT Exemplar Class 12 ,

In a pseudo first order hydrolysis of ester in water, the following results were obtained. i) Calculate the average rate of reaction between the time interval 30 to 60 seconds. ii) Calculate the pseudo first order rate constant for the hydrolysis of ester. In a pseudo first order hydrolysis of ester in water Mention the [...]

What is the effect of temperature on the rate constant of reaction? How can this temperature effect on the rate constant be represented quantitatively? What is the effect of temperature on the rate constant of reaction? How can this temperature effect on the rate constant be represented quantitatively? June 4, 2021 Category: Chemistry , NCERT [...]