Boric acid `(H_(3)BO_(3))` prepared fromA. boraxB. boron trihalidesC. colemaniteD. all of these

Boric acid `(H_(3)BO_(3))` prepared fromA. boraxB. boron trihalidesC.

1.	Boric acid `(H_(3)BO_(3))` prepared fromA. boraxB. boron trihalidesC. colemaniteD. all of these
Answer» Correct Answer - D By treating a hot concentrated solution of borax with hydrocloric or sulhuric acid: `Na_(2)B_(4)O_(7) + H_(2)SO_(4) + 5H_(2)O rarr 4H_(3)BO_(3) + Na_(2)SO_(4)` By the hydrolysis of boron trihalides : `BCl_(3) + 3H_(2)O rarr H_(3)BO_(3) + 3HCl` By passing sulphurr dioxide through the solution of colemanite in boiling water. `Ca_(2)B_(6)O_(11) + 4SO_(2) + 11H_(2)O rarr 2Ca(HSO_(3))_(2) + 6H_(3)BO_(3)`

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Boric acid `(H_(3)BO_(3))` prepared fromA. boraxB. boron trihalidesC. colemaniteD. all of these

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