What happens when (a) Borax is heatedstrongly, (b) Boric acid is added to water, (c ) Aluminium is treated wi th dilute NaOH, (d) BF_(3) is reacted with ammonia ?

What happens when (a) Borax is heatedstrongly, (b) Boric acid is added

1.	What happens when (a) Borax is heatedstrongly, (b) Boric acid is added to water, (c ) Aluminium is treated wi th dilute NaOH, (d) BF_(3) is reacted with ammonia ?
Answer» Solution :(a) When borax is heatedstrongly, a transparentglassybead which consis of sodium METABORATE `(NaBO_(2))` and boric anhydride is formed `UNDERSET(" Borax ")(Na_(2)B_(4)O_(7).10H_(2))overset("Heat")rarrNa_(2)B_(4)O_(7) + 10H_(2)O` (b) Boric act as a weak LEWIS ACID by accepting a hydroxideion of waterand releasing a proton the solution. (c ) Dihydrogen is evolved. `2Al (s) + 2NaOH(aq) + 6H_(2)O(l) rarr 2Na^(+) [Al(OH)_(4)]^(-) + 3H_(2)(g)` (d) `BF_(3)` beinga Lewisacid accepts a PAIR of electrons from `NH_(3)`to form the corresponding complex.