NCERT Class XII Chemistry
Chapter - Chemical Kinetics
Questions with Solutions
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Question : 25
Total: 39
Sucrose decomposes in acid solution into glucose and fructose according to the first order rate law, with t1 ∕ 2
Solution:
Sucrose decomposes according to first order rate law, hence
k =
log
,
t 1 ∕ 2 = 3 h r s ,
t = 8 h r s ,
= ?
t 1 ∕ 2 = 3.0
∴ k =
=
= 0.231 h r − 1
Hence,0.231 =
log
or,log
= 0.8024
or,
= ( 0.8024 ) = 6.345
or,
=
= 0.158
Hence,
or,
or,
or,
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