Chemical Kinetics questions
1373 published questions with worked solutions.
- The minimum energy required for a molecule to take part in a reaction is called
- The activation energy of a reaction is zero. The rate constant for the reaction
- In Arrhenius equation, k=Ae^ -E_a/RT ; A may be called
- The activation energy of a reaction is 9 kcal/mol. The increase in the rate constant when its temperature is raised from 295 to...
- The activation energy for a simple chemical reaction A B is E_a in forward direction. The activation energy for the reverse...
- A first order reaction is 50% complete in 30 min at 27°C and in 10 min at 47°C. The energy of activation of the reaction is
- Arrhenius equation may not be represented as
- According to the Arrhenius equation a straight line is to be obtained by plotting the logarithm of the rate constant of a...
- Increase in the concentration of the reactants leads to the change in
- The rate constant of a reaction increases by 5% when its temperature is raised from 27°C to 28°C. The activation energy of the...
- In Arrhenius plot intercept is equal to
- For an endothermic reaction where, H represents the enthalpy of the reaction in kJ/mol, the minimum value for the energy of...
- Which of the following statements are correct? 1. Order of a reaction can be known from experimental result and not from the...
- In a 1st order reaction the concentration of reactant decreases from 800 mol/dm³ to 50 mol/dm³ in 2 10^4 ,s. The rate constant of...
- An endothermic reaction A B has an activation energy of 15 kcal/mol and the energy of reaction is 5 kcal/mol. The activation...
- Assertion: Lower activation energy fastens the reaction. Reason: If the activation energy of a reaction is zero, temperature will...
- Assertion: As the temperature increases, rate of reaction increases. Reason: The rate of reaction increases due to increase in...
- Assertion: In the reaction I_2+2S_2O_3^ 2- S_4O_6^ 2- +2I^-, the two S_2O_3^ 2- ions are used for every I_2. Reason: The rate of...
- Activation energy of a chemical reaction can be determined by
- Effect of temperature on reaction rate is given by
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