1.

The half life of a first order reaction is 10 minutes. If initial amount is 0.08 mole/litre and concentration at some instant ‘t’ is 0.01 mol/litre, then the value of ‘t’ is :

Answer»

10 MINUTES
30 minutes
20 minutes
40 minutes

Solution :0.08 MOL `l^(-1)` to `0.01` mol `l^(-1)` involves 3 half-life . So the t is 30 minutes .


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