Write balanced equations for the following:
(i) `BF_(3)+LiHrarr` (ii) `B_(2)H_(6)+H_(2)Orarr` (iii) `NaH+B_(2)H_(6)rarr`
(iv) `H_(3)BO_(3)rarr` (v) `Al+NaOHrarr` (vi) `B_(2)H_(6)+NH_(3)rarr`

Explanation

(i) `2BF_(3) + 6LiH rarr underset("Diborane")(B_(2)H_(6))+6LiF` (ii) `underset("Diborane")(B_(2)H_(6)) + 6H_(2)Orarrunderset("Orthoboric acid")(2H_(3)BO_(3)) + 6H_(2)`
(iii) `2NaH + B_(2)H_(6)rarr underset( " Sod. boronhydride ")(2Na^(+) [BH_(4)]^(-))` , (iv) `underset(" Orthoboric acid ")(H_(3)BO_(3)) overset(Delta)rarr underset(" Metaboric acid ")(HBO_(2)) + H_(2)O`
`underset("Metaboric acid ")(4HBO_(2))overset(Delta)underset(-H_(2)O)rarrunderset("Tetraboric acid ")(H_(2)B_(4)O_(7))overset(Delta)rarrunderset("Boron fluoride ")(2B_(2)O_(3))+H_(2)O`
(v) `2Al + 2NaOH + 6H_(2)O rarr underset("Sod. tetrahydroxoaluminate (III) ")(2Na^(+)[Al(OH)_(4)]^(-)) + 3H_(2)`
(vi) `B_(2)H_(6) + 2NH_(3) rarr underset(" Borane-ammonia complex ")(2BH_(3). NH_(3))`