A) \[1.0\times {{10}^{-3}}\]
B) \[1.0\times {{10}^{-6}}\]
C) \[1.0\times {{10}^{-8}}\]
D) \[1.0\times {{10}^{-11}}\]
Correct Answer: D
Solution :
\[{{K}_{a}}=C{{\alpha }^{2}}\] \[C=0.1M\] \[\alpha =0.001%=\frac{0.001}{100}\] \[{{K}_{a}}=\frac{0.1\times 0.001\times 0.001}{100\times 100}\] \[{{K}_{a}}=1.0\times {{10}^{-11}}\]
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