Chemical Kinetics Test

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Chemical Kinetics Test - 1

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Weekly Quiz Competition

Question 1
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Study of rate of chemical reaction is known as

A
Chemical change

B
Chemical thermodynamics

C
Chemical equilibrium

D
Chemical kinetics

Solution

Explanation:

Chemical Kinetics deals with rate of a Chemical reactions.
Question 2
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Which among the following is an instantaneous reaction?

A
Precipitation of silver chloride

B
Rusting of iron

C
Burning of a log of wood

D
Hydrolysis of starch

Solution

Explanation:

Precipitation of AgCl is an example of instantaneous reaction.
Question 3
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The rate of reaction can be measured as

A
Rate of appearance of the product

B
Both (b) and (c).

C
Rate of appearance of reactant

D
Rate of disappearance of reactant

Solution

Explanation:

Rate of reaction can be measured in terms of Rate of disappearance of reactant or rate of apperance of product.
Question 4
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What is the order of a reaction which has a rate expression ; Rate =k[A]^3/2[B]⁻¹

A
0

B
3/2

C
1/2

D
1

Solution

Explanation:

Total order of reaction = order wrt to A + order wrt to B.
Question 5
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Molecularity of a reaction

A
Can have a fractional values

B
Can be zero

C
Is always a whole number

D
Cannot be less than 2

Solution

Explanation:

Molecularity means minimum no. of atoms molecules or ions which undergo collision for conversion of reactant to Product. So it is a whole no. Cannot be fractional or negative.
Question 6
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For which of the following reaction the units of rate constant and rate of the reaction are same?

A
Third order reaction

B
First order reaction

C
Zero order reaction

D
Second order reaction

Solution

Explanation:

Rate=k[Reactant]⁰
Question 7
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Which of the following statement is true for order of a reaction?

A
It can have fractional value

B
It depends on the stiochiometric coefficients of reactants as well as products

C
It cannot be determined experimentally

D
It can be written from the balanced chemical equation

Solution

Explanation:

Order of a reaction is experimentally determined quantity so it can be negative fractional or zero.
Question 8
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For a reaction; pA +qB products, the rate law expression is r = k[A]^l [B]^m . Which among the following statement is true for this expression?

A
(p+q) may or may not be equal to (l+m)

B
(p+q) ≠≠ (l+m)

C
(p+q) = (l+m)

D
(p+q) > (l+m)

Solution

Explanation:

Order of a reaction is experimentally determined quantity. It may or may not be equal to stoichiometric coefficients.

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Chemical Kinetics Test - 1

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Question 1

Chemical change

Chemical thermodynamics

Chemical equilibrium

Chemical kinetics

Solution

Question 2

Precipitation of silver chloride

Rusting of iron

Burning of a log of wood

Hydrolysis of starch

Solution

Question 3

Rate of appearance of the product

Both (b) and (c).

Rate of appearance of reactant

Rate of disappearance of reactant

Solution

Question 4

0

3/2

1/2

1

Solution

Question 5

Can have a fractional values

Can be zero

Is always a whole number

Cannot be less than 2

Solution

Question 6

Third order reaction

First order reaction

Zero order reaction

Second order reaction

Solution

Question 7

It can have fractional value

It depends on the stiochiometric coefficients of reactants as well as products

It cannot be determined experimentally

It can be written from the balanced chemical equation

Solution

Question 8

(p+q) may or may not be equal to (l+m)

(p+q) ≠≠ (l+m)

(p+q) = (l+m)

(p+q) > (l+m)

Solution

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