A) 135 min
B) 103.7 min
C) 38.7 min
D) 45 min
Correct Answer: B
Solution :
\[k=\frac{2.303}{t}\log \left( \frac{{{r}_{\infty }}-{{r}_{0}}}{{{r}_{\infty }}-{{r}_{t}}} \right)\]\[=\frac{2.303}{k}\log \,\,\left( \frac{-\,11-\,34}{-\,11-\,19} \right)\]\[=1.35\times {{10}^{-2}}{{\min }^{-1}}\] |
If solution is optically inactive \[{{r}_{t}}=0\] |
\[t=\frac{2.303}{k}\log \left( \frac{-\,45}{-\,11} \right)=103.7\,\,\min \] |
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