A substance decomposes by following first order kinetics. If $50\%$ of the compound is decomposed in $120\text{ minutes}$, how long will it take for $90\%$ of the compound to decompose?
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Chemical Kinetics - ISC Class 12 Chemistry Questions with Answers, Page 4
65 past-paper questions on Chemical Kinetics from ISC Class 12 Chemistry papers (2027-2018), newest first, in full. Questions 61-65 are on this page, 20 to a page. Tap "Show answer" under a question to see its answer.
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Write two differences between ‘order of reaction’ and ‘molecularity of reaction’.
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(i)
Write the rate law expression for the reaction $\text{A} + \text{B} + \text{C} \rightarrow \text{D} + \text{E}$, if the order of reaction is first, second and zero with respect to A, B and C, respectively.
(ii)
How many times the rate of reaction will increase if the concentration of A, B and C are doubled in the equation given in (i) above?
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The rate of reaction becomes four times when the temperature changes from $293\text{ K}$ to $313\text{ K}$. Calculate the energy of activation ($E_a$) of the reaction assuming that it does not change with temperature. ($R = 8\cdot314\text{ J K}^{-1}\text{mol}^{-1}$)
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$40\%$ of a first order reaction is completed in $50\text{ minutes}$. How much time will it take for the completion of $80\%$ of this reaction?
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