Chemical Kinetics Test

Result

Chemical Kinetics Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Study of rate of chemical reaction is known as

A
Chemical equilibrium

B
Chemical thermodynamics

C
Chemical change

D
Chemical kinetics

Solution

Chemical kinetics is the branch of chemistry which deals with the study of rate of reaction, factors affecting the rate of reaction and mechanism of the chemical reaction.
Question 2
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The rate of reaction can be measured as

A
Rate of disappearance of reactant

B
Rate of appearance of reactant

C
Rate of appearance of the product

D
Rate of reaction can be measured in terms of Rate of disappearance of reactant or rate of appearance of product

Solution

rate of reaction = (+) rate of appearance of products = (-) rate of disappearance of reactants
Question 3
1 / -0

What is the order of a reaction which has a rate expression ; Rate = k[A]^3/2[B]¹

A
1

B
0

C
3/2+1

D
3/2

Solution

Order of a reaction may be defined as sum of the powers of the concentration of each reactant in the rate law expression.
therefore, order of this reaction is 3/2 + 1 = 5/2 = 2^1/2
Question 4
1 / -0

Molecularity of a reaction

A
Cannot be less than 2

B
Can have a fractional values

C
Can be zero

D
Is always a whole number

Solution

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 5
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Which of the following statement is true for order of a reaction?

A
It cannot be determined experimentally

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

C
It can have fractional value

D
It can be written from the balanced chemical equation

Solution

Order of a reaction is experimentally determined quantity so it can be whole number value, negative, fractional or zero.
Question 6
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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) ≠ (l+m)

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

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

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

Solution

Order of a reaction is experimentally determined quantity. it can be calculated as sum of power of each reactant in rate law expression.so, It may or may not be equal to stoichiometric coefficients.