A) 45
B) 120
C) 90
D) 60
Correct Answer: D
Solution :
\[k=\frac{2.303}{t}\log \left( \frac{a}{a-x} \right)\]; \[k=\frac{2.303}{30}\log \left( \frac{100}{100-75} \right)\] \[k=\frac{2.303}{t}\log \left( \frac{100}{100-93.75} \right)\] Put the value of \[K\] from above equation we get the value of \[t\] therefore \[\therefore \ \ \ t=60\,\min .\]You need to login to perform this action.
You will be redirected in
3 sec