Ca_(2)B_(6)O_(11)+Na_(2)CO_(3)overset(Delta)rarr[X]+CaCO_(3)+NaBO_(2) (unbalanced equation) Correct choice (s) for [X] is/are :

Ca_(2)B_(6)O_(11)+Na_(2)CO_(3)overset(Delta)rarr[X]+CaCO_(3)+NaBO_(2)

1.	Ca_(2)B_(6)O_(11)+Na_(2)CO_(3)overset(Delta)rarr[X]+CaCO_(3)+NaBO_(2) (unbalanced equation) Correct choice (s) for [X] is/are :
Answer» X with `NaOH(aq)`, GIVES a COMPOUND which on reaction with `H_(2)O_(2)` in alkaline medium yield a compound used as a brightner in soaps. Structure of anion of crystalline [X] has one boron ATOM `sp^(3)` hybridised and other three boron atoms `sp^(2)` hydridiseed. Hydrolysis of `[X]` with `HCl` or `H_(2)SO_(4)` yields a compound on reaction with HF gives fluoroboric acid. [X] on heating with chromium salts in OXIDISING flame GREEN coloured bead. Answer :A::C::D