A) 30 s
B) 220 s
C) 300 s
D) 347 s
Correct Answer: D
Solution :
[d] Given \[\left[ A \right]=0.01\text{ }M\] Rate \[=2.0\times {{10}^{-5}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\] For a first order reaction Rate \[=k\left[ A \right]\] \[k=\frac{2.0\times {{10}^{-5}}}{[0.01]}=2\times {{10}^{-3}}\] \[{{t}_{1/2}}=\frac{0.693}{2\times {{10}^{-3}}}=347\sec \]You need to login to perform this action.
You will be redirected in
3 sec