A) \[2\times {{10}^{4}}\]
B) \[3.45\times {{10}^{-5}}\]
C) \[1.386\times {{10}^{-2}}\]
D) \[2\times {{10}^{-4}}\]
Correct Answer: C
Solution :
\[k=\frac{2.303}{t}{{\log }_{10}}\frac{a}{a-x}\]; \[t=2\times {{10}^{2}},\,\,a=800,\,\,a-x=50\] \[k=\frac{2.303}{2\times {{10}^{2}}}{{\log }_{10}}\frac{800}{50}=\frac{2.303}{2\times {{10}^{2}}}{{\log }_{10}}16\] \[=\frac{2.303}{2\times {{10}^{2}}}{{\log }_{10}}{{2}^{4}}=\frac{2.303}{2\times {{10}^{4}}}\times 4\times 0.301\] \[=1.38\times {{10}^{-2}}\,\,{{s}^{-1}}\]You need to login to perform this action.
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