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Test: Determination of Rate of a Reaction, Arrhenius theory - JEE MCQ


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15 Questions MCQ Test Chemistry for JEE Main & Advanced - Test: Determination of Rate of a Reaction, Arrhenius theory

Test: Determination of Rate of a Reaction, Arrhenius theory for JEE 2024 is part of Chemistry for JEE Main & Advanced preparation. The Test: Determination of Rate of a Reaction, Arrhenius theory questions and answers have been prepared according to the JEE exam syllabus.The Test: Determination of Rate of a Reaction, Arrhenius theory MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Determination of Rate of a Reaction, Arrhenius theory below.
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Test: Determination of Rate of a Reaction, Arrhenius theory - Question 1

The time taken for of a first order reaction to complete is approximately

Detailed Solution for Test: Determination of Rate of a Reaction, Arrhenius theory - Question 1
(I)
(II)
Dividing
Test: Determination of Rate of a Reaction, Arrhenius theory - Question 2

 A foreign substance that increase the speed of a chemical reaction is called

Detailed Solution for Test: Determination of Rate of a Reaction, Arrhenius theory - Question 2

Catalyst: Substances which alter  the rate of a chemical reaction and themselves remain chemically and quantitatively unchanged  after the reaction are known as catalysts and the phenomenon is known as catalysis.

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Test: Determination of Rate of a Reaction, Arrhenius theory - Question 3

. What will be the value of instantaneous rate of reaction from the graph?

Detailed Solution for Test: Determination of Rate of a Reaction, Arrhenius theory - Question 3

If you make a graph of concentration of reactant vs time, the instantaneous reaction rate at a given time is the slope of the tangent line at that point in time. It is also the value of the rate law at a specific concentration (dA/dt is rate = k [A]).

Test: Determination of Rate of a Reaction, Arrhenius theory - Question 4

The rate of a chemical reaction doubles for every 10°C rise of temperature. If the temperature is raised by 50°C, the rate of the reaction increases by about 

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Detailed Solution for Test: Determination of Rate of a Reaction, Arrhenius theory - Question 4

For 2times=10°c.
for 4times=20°c.
for 6times=30°c.
for 8times=40°c.
and for 10times=50°c.

For every 10°C rise of temperature, the rate is doubled. Thus, the temperature coefficient of the reaction = 2

When temperature is increased by 50°, rate becomes =2(50/10) = 25 times = 32 times

Test: Determination of Rate of a Reaction, Arrhenius theory - Question 5

 Chemical substances speeding up rate of chemical reaction is called as

Detailed Solution for Test: Determination of Rate of a Reaction, Arrhenius theory - Question 5

A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process. Catalysts typically speed up a reaction by reducing the activation energy or changing the reaction mechanism. Enzymes are proteins that act as catalysts in biochemical reactions.

Test: Determination of Rate of a Reaction, Arrhenius theory - Question 6
Which of the following reactions is not of the first order?
Detailed Solution for Test: Determination of Rate of a Reaction, Arrhenius theory - Question 6
It is a second order reaction, first order both w.r.t and .

All other options are of first order reaction.
Test: Determination of Rate of a Reaction, Arrhenius theory - Question 7
A first order reaction is completed in 20 minutes at and in 5 minutes at . The energy of activation of the reaction is :
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Test: Determination of Rate of a Reaction, Arrhenius theory - Question 8
In a first-order reaction , if is rate constant and initial concentration of the reactant is , then the halflife is
Detailed Solution for Test: Determination of Rate of a Reaction, Arrhenius theory - Question 8
For a first order reaction

when

or
Test: Determination of Rate of a Reaction, Arrhenius theory - Question 9

of a radioactive element is disintegrated to in 2.303 minutes. What is the half-life (in minutes) of that radioactive element?

Detailed Solution for Test: Determination of Rate of a Reaction, Arrhenius theory - Question 9

Radioactive disintegration is first order reaction

Test: Determination of Rate of a Reaction, Arrhenius theory - Question 10
Half life period of a first-order reaction is 1386 seconds. The specific rate constant of the reaction is:
Detailed Solution for Test: Determination of Rate of a Reaction, Arrhenius theory - Question 10
For a first order reaction
Test: Determination of Rate of a Reaction, Arrhenius theory - Question 11
, it would be a zero order reaction when
Detailed Solution for Test: Determination of Rate of a Reaction, Arrhenius theory - Question 11
For reaction
If it is zero order reaction , i. e the rate remains same at any concentration of ' . i.e independent upon concentration of A.
Test: Determination of Rate of a Reaction, Arrhenius theory - Question 12
The decomposition of a substance follows first order kinetics. Its concentration is reduced to th of its initial value in 24 minutes. The rate constant of the decomposition process in is
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Test: Determination of Rate of a Reaction, Arrhenius theory - Question 13
The time required for completion of of a first order reaction is minutes. The half life of it (in minutes) is
Detailed Solution for Test: Determination of Rate of a Reaction, Arrhenius theory - Question 13
The time required for completion of of a first order reaction is minutes. The half life of it (in minutes) is
Test: Determination of Rate of a Reaction, Arrhenius theory - Question 14
The halflife of a radioactive element is 20 min. The time interval between the stages of its and decay is
Detailed Solution for Test: Determination of Rate of a Reaction, Arrhenius theory - Question 14
Change in to is almost half the concentration change.

So time interval between the stages of its and decay is same as
Test: Determination of Rate of a Reaction, Arrhenius theory - Question 15
The reaction follows first order kinetics. The time taken for mole of to produce mole of is 1 hour. What is the time taken for conversion of mole of to produce mole of B?
Detailed Solution for Test: Determination of Rate of a Reaction, Arrhenius theory - Question 15
For a first order reaction
Given
or
again


Hence hour
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