Which has maximum value of equilibrium constant ? (a) CH COOH H O CH COO H O -> (b) HCOOH H O HCOO H O -> (c) C H COOH H O C H COO H O -> (d) CF COOH H O CF COO H O ->

Value of equilibrium constant means highest will be its dissociation and the dissociation will be highest for strongest acid. Hence the maximum value of equilibrium constant will be for CF3COOH and it will be easily dissociated. So correct answer is option (d)