1.

The dissociation constants of a weak acid HA and weak base BOH are \[2\times {{10}^{-5}}\] and \[5\times {{10}^{-6}}\] respectively. The equilibrium constant for the neutralisation reaction of the two is

A. \[1.0\times {{10}^{4}}\]          
B. \[1.0\times {{10}^{-4}}\]
C. \[1.0\times {{10}^{-10}}\]        
D. \[2.5\times {{10}^{-1}}\]
Answer» B. \[1.0\times {{10}^{-4}}\]


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