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Byju's Answer
Standard XII
Chemistry
Introduction
Explain the t...
Question
Explain the terms rate determine step and reaction intermediate.
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Solution
The reaction mechanism describes
the sequence of elementary reactions that
occur to go from reactants to products.
Reaction intermediates:
They are formed in one step and
then consumed in a later step of
the mechanism.
The slowest step in
the mechanism is
called the
rate-determining step.
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Similar questions
Q.
The slowest step of the reaction in a multi-step reaction is called rate-determining step.
Q.
Assertion :For the reaction given below, the molecularity of first step is 1 and of second step is 2.
2
O
3
(
g
)
→
3
O
2
(
g
)
Step 1
O
3
(
g
)
⇌
O
2
(
g
)
+
O
(
g
)
Step 2
O
3
(
g
)
+
O
s
l
o
w
−
−
→
2
O
2
(
g
)
Reason: O(g) is an intermediate and rate of reaction is
K
[
O
3
]
2
[
O
2
]
−
1
and order of reaction is 1.
Q.
Explain the method of initial rates to determine rate law and order of reaction.
Q.
Assertion :Rate of nitration is
C
6
H
6
≃
C
6
D
6
≃
C
6
T
6
Reason: Formation of intermediate is rate determining step in nitration of benzene, not the breaking of
C
−
H
or
C
−
D
bond.
Q.
Explain isolation method to determine rate law and order of reaction.
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