Order and Molecularity of Reactions NEET Questions

Physical Chemistry - Chemical Kinetics

Order and Molecularity of Reactions MCQ Questions


13.
Order of reaction is zero. This implies that
A.
rate is independent of reactant concentration
B.
rate decreases over time
C.
rate is inversely proportional to concentration
D.
rate depends on time
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ANSWER :
A. rate is independent of reactant concentration
14.
A reaction is first order in A and zero order in B. Rate law is
A.
rate = k[A][B]
B.
rate = k[B]
C.
rate = k[A]
D.
rate = k[A][B]²
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ANSWER :
C. rate = k[A]
15.
Molecularity can be applied to
A.
only overall reactions
B.
any complex reaction
C.
only elementary steps
D.
only product side reactions
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ANSWER :
C. only elementary steps
16.
A unimolecular reaction involves
A.
one product
B.
one intermediate
C.
one reactant molecule
D.
one catalyst
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ANSWER :
C. one reactant molecule
17.
In which case is molecularity undefined?
A.
Unimolecular reaction
B.
Complex reaction
C.
Elementary reaction
D.
Zero-order reaction
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ANSWER :
B. Complex reaction
18.
For the reaction: A + B → products, rate = k[A], the order is
A.
1 w.r.t A, 1 overall
B.
1 w.r.t A, 0 w.r.t B
C.
1 w.r.t both A and B
D.
0 overall
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ANSWER :
B. 1 w.r.t A, 0 w.r.t B