A) 2/3 log 2
B) 2/3 log 4
C) 3/2 log 2
D) 3/2 log 4
Correct Answer: A
Solution :
For first order reaction, \[k=\frac{2.303}{t}\log \left( \frac{a}{a-x} \right)\] \[6.909=\frac{2.303}{t}\log \frac{100}{100-75}\] \[t=\frac{1}{3}\log \frac{100}{25}\] \[=\frac{1}{3}\log 4=\frac{1}{3}\log {{2}^{2}}\] \[=\frac{2}{3}\log 2\]You need to login to perform this action.
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