Chemical Kinetics questions
1373 published questions with worked solutions.
- Two substances A and B are present such that [A]=4[B] and half-life of A is 5 minute and of B is 15 minute. If they start...
- The rate of reaction becomes 2 times for every 10°C rise in temperature. How the rate of reaction will increase when temperature...
- For a first order reaction A , the initial concentration of A is 0.1 M and after 40 minute it becomes 0.025 M. Calculate the rate...
- In a reaction, A+B , rate is doubled when the concentration of B is doubled, and rate increases by a factor of 8 when the...
- The rate constant of a second order reaction is 10^ -2 ,M^ -1 s^ -1 . The rate constant expressed in cc.molecule^ -1 min^ -1 is:
- During the kinetic study of the reaction 2A+B C+D following results were obtained. | Run | [A] in M | [B] in M | Initial rate of...
- Ethylene is produced by cyclobutane as: C_4H_8 2C_2H_4. The rate constant is 2.48 10^ -4 ,sec^ -1 . In what time will the molar...
- For the reaction N_2O_5(g) 2NO_2(g)+ 12O_2(g), the rate of disappearance of N_2O_5 is 6.25 10^ -3 ,mol ,L^ -1 s^ -1 . The rate of...
- For a given reaction of first order, it takes 15 minute for the concentration to drop from 0.8 M litre^ -1 to 0.4 M litre^ -1 ....
- For a first order reaction, (A) , the concentration of A changes from 0.1 M to 0.025 M in 40 minutes. The rate of reaction when...
- For a reaction aA bB when [A]=2.2 ,mM, the rate was found to be 2.4 ,mMs^ -1 . On reducing concentration of [A] to half, the rate...
- K for a zero order reaction is 2 10^ -2 ,mol ,L^ -1 sec^ -1 . If the concentration of the reactant after 25 sec is 0.5 M, the...
- For a certain reaction of order 'n' the time for half change t_ 1/2 is given by; t_ 1/2 = 2- 2 K c_0^ 1/2 , where K is rate...
- For A+B C+D, H=-20 ,kJ/mol the activation energy of the forward reaction is 85 ,kJ/mol. The activation energy for backward...
- For the reaction N_2+3H_2 2NH_3, the rate d[NH_3] dt =2 10^ -4 ,M ,s^ -1 . Therefore, the rate - d[N_2] dt is given as:
- The rate constant is numerically the same for three reactions of first, second and third order respectively. Which one is true...
- In a first order reaction A B, if K is the rate constant initial concentration of the reactant is 0.5 M, then half-life is:
- For a reaction A+B , the rate of the reaction was doubled when the concentration of A was doubled. When the concentration of A...
- In a first order reaction, the concentration of the reactant is decreased from 1.0 M to 0.25 M in 20 minute. The rate constant of...
- For a given reaction, pressure of catalyst reduces the energy of activation by 2 kcal at 27°C. The rate of reaction will be...
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