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1. |
The half life of a first order reaction is 10 minutes. If initial amount is \[0.08\,mol/litre\] and concentration at some instant is \[0.01\,mol/litre\], then \[t=\] [Roorkee 1990] |
A. | 10 minutes |
B. | 30 minutes |
C. | 20 minutes |
D. | 40 minutes |
Answer» C. 20 minutes | |