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Byju's Answer
Standard XII
Chemistry
First Order Reaction
For a first o...
Question
For a first order reaction,
t
0.75
is 138.6 seconds. Its specific rate constant (in
s
−
1
) is:
A
10
−
2
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B
10
−
4
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C
10
−
5
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D
10
−
6
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Solution
The correct option is
A
10
−
2
We know that:
Half life for first order reaction
=
0.693
k
and
t
1
2
=
1
2
×
t
0.75
0.693
k
=
138.6
2
k
=
10
−
2
Suggest Corrections
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For a first order reaction,
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