Which of the following represents the expression for 34th life of the 1st order reaction ?
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a
t=2.303klog34
b
t=2.303klog3
c
t=2.303klog4
d
t=K2.303log43
answer is C.
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Detailed Solution
Applying the first order kinetics,t=2.303Klogaa−xWhere,t = timeK = rate constanta = initial concentrationa-x =After time the concentrationWhen the reaction is 34 complete then a-x= 14∴ t=2.303klog11/4=2.033klog4