M.Sc. Chemistry (PU-CET P.G) 2019 Panjab University Entrance Exam With Answers

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64.

A first order reaction takes 40 min for 30% decomposition.

Calculate t1/2 (Given log 3 = 0.477, log 5 = 0.699 , log 7 = 0.845 )
A: 77.7
B: 8.9
C: 133.7
D: 80.5

The answer is: A

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