Chemical Kinetics - Online Test
Q1. For the first order reaction, half life is equal to
Answer : Option D
Explaination / Solution:
For 1st order reaction half life is independent of initial concentration of reactant.
Q2. The half life periods of a reaction at initial concentration 0.1 mol/L and 0.5 mol/L are 200 s and 40 s respectively. The order of the reaction is
Answer : Option D
Explaination / Solution:
As initial concentration is increased half life is decreasing so order of reaction is 2.
Q3. Which among the following is an instantaneous reaction?
Answer : Option A
Explaination / Solution:
Precipitation of AgCl is an example of instantaneous reaction.
Q4. The half life of a reaction is halved as the initial concentration of the reactant is doubled. The order of the reaction is
Answer : Option B
Explaination / Solution:
For second order reaction half life is inversely related to concentration of reactant.
Q5. The substance that slows down the reaction without being consumed is known as
Answer : Option B
Explaination / Solution:
Inhibitors inhibits the action of catalyst and hence slows down the rate of reaction.
Q6. Activation energy of a reaction is
Answer : Option C
Explaination / Solution:
Activation energy is minimum energy required for reactant to get converted to product.
Q7. The rate law for the reaction is given by rate= k[RCl]. The rate for this reaction
Answer : Option C
Explaination / Solution:
Since order of reaction with respect to RCl is one so if conc of Rcl is halfed the rate of reaction will also become half.
Q8. For an endothermic reaction, the minimum value for the energy of activation in terms of will be
Answer : Option C
Explaination / Solution:
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Q9. Order of the photochemical reaction occurring between hydrogen and chlorine is
Answer : Option B
Explaination / Solution:
Photochemical reaction between and is 0 zero wrt to reactants.
Q10. The temperature coefficient of most of the reactions lies between
Answer : Option C
Explaination / Solution:
For every 100 rise in temperature rate of reaction increases by factor of 2 or 3.
