Order and Molecularity of Reactions NEET Questions

Physical Chemistry - Chemical Kinetics

Order and Molecularity of Reactions MCQ Questions


7.
Molecularity of a complex reaction
A.
is always equal to order
B.
is sum of powers of rate law
C.
cannot be defined
D.
is sum of stoichiometric coefficients of overall reaction
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ANSWER :
C. cannot be defined
8.
For an elementary reaction, order equals
A.
molecularity
B.
stoichiometry
C.
zero
D.
intermediates
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ANSWER :
A. molecularity
9.
A reaction with rate law: rate = k[A]²[B], total order is
A.
1
B.
2
C.
3
D.
4
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ANSWER :
C. 3
10.
Molecularity of the reaction A → products is 1. It is called
A.
unimolecular
B.
bimolecular
C.
trimolecular
D.
elementary
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ANSWER :
A. unimolecular
11.
What is the unit of rate constant for a zero-order reaction?
A.
mol⁻¹ L s⁻¹
B.
s⁻¹
C.
L mol⁻¹ s⁻¹
D.
mol L⁻¹ s⁻¹
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ANSWER :
D. mol L⁻¹ s⁻¹
12.
Which reaction has molecularity equal to 2?
A.
A → B
B.
2A → B
C.
A + B → C
D.
A → B + C
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ANSWER :
C. A + B → C