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Methods of Determining Reaction Order MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET
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13 Questions around this concept.
Solve by difficulty
Consider the Reaction the half life of a reaction at initial concentration
are 200 sec and 40 sec respectively. The order of the reaction is
Consider a reaction -having half -life 50 min- for a certain initial concentration. If the concentration of the reactions becomes doubled, the half-life of the reaction becomes
.What is order of the reaction :
Consider a reaction
, having
is constant. the order of the reaction is:
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Calculate the order of the reaction if 0.3 s and 0.6 s is the half life of two given samples. Also, initial concentration of the samples is 160 M and 80M respectively.
At 12.5 KPa and 800 K, a gaseous reaction had the half life period of 375 s. Find the order of the reaction, if the pressure is changed to 45 KPa
was found to be constant in a single reactant reaction. Find the order of the reaction in which
and T is the initial concentration of the reactant and half life, respectively. What is the order of the reaction?
For a reaction when volume of ron vessel reduce to half life become half. The order of reaction will be
Consider a reaction Produce with the rate law Expression is
. The order of reaction ls:
Consider the reaction produced with ratelaw expression is Rate
what will be the unit of rate constant (K) ?
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How to Determine Order of Reaction: Half Life Method
It is used when the rate law involves only one concentration term.
or
For two different concentrations, we have:
On taking logarithms on both sides, we get:
Hence,
Here, n is the order of the reaction.
How to Determine Order of Reaction: Graphical Method
Here graphs are plotted between rate and concentration to find the order of the reaction.
Plots of Rate vs Concentration
How to Determine Order of Reaction - Integrated Rate Law Method
If the data for time(t) and [A] is given then this method is applicable. Thus follows the steps given below to find the order of reaction by using the integrated rate law method.
- Check for First Order:
- Use the formula given below to find out the two values of k as k1 and k2.
- If these two values k1 and k2 are same, then this given reaction is of first-order. But if k1≠ k2, then check for zero-order.
- Use the formula given below to find out the two values of k as k1 and k2.
- Check for Zero-Order:
- Use the formula given below to find out the two values of k as k1 and k2.
- Again, if these two values k1 and k2 are same, then this given reaction is of zero-order. But if k1≠ k2, then check for second-order.
- Use the formula given below to find out the two values of k as k1 and k2.
- Check for Third-Order:
- Use the formula given below to find out the two values of k as k1 and k2.
- Further, if these two values k1 and k2 are same, then this given reaction is of second-order. But if k1≠ k2, then check for third-order and so on.
- Use the formula given below to find out the two values of k as k1 and k2.
Study it with Videos
How to Determine Order of Reaction: Half Life Method
How to Determine Order of Reaction: Graphical Method
How to Determine Order of Reaction - Integrated Rate Law Method"Stay in the loop. Receive exam news, study resources, and expert advice!"
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