NCERT Class XII Chemistry
Chapter - Chemical Kinetics
Questions with Solutions
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Question : 35
Total: 39
A first order reaction has a rate constant 1.15 × 10 – 3 s − 1
Solution:
Here, [ R ] 0 = 5 g , [ R ] = 3 g ,
k = 1.15 × 10 − 3 s − 1
For first order reaction,t =
log
=
log
= 2.00 × 10 3 ( log 1.667 )
= 2.0 × 10 3 × 0.2219 s
= 443.8
= 444 s
For first order reaction,
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