1.

H_(3)BO_(3) when dissolved in heavy water gives

Answer»

`D_(3)O^(+)` ion
`H_(3)O^(+)` ions
`HD_(2)O^(+)` ions
`DH_(2)O^(+)` ions.

Solution :`H_(3)BO_(3)+D_(2)O RARR D^(+)+[B(OH)_(3)(OD)]^(-)`


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