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Boric acid (H(3)BO(3)) prepared from...

Boric acid `(H_(3)BO_(3))` prepared from

A

borax

B

boron trihalides

C

colemanite

D

all of these

Text Solution

Verified by Experts

The correct Answer is:
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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Knowledge Check

  • Boric acid (H_(3)BO_(3)) is :

    A
    tribasic
    B
    dibasic
    C
    monobasic
    D
    aprotic

  • H_(3)BO_(3) is

    A
    Monobasic and weak Lewis acid
    B
    Monobasic and weak Bronsted acid
    C
    Monobasic and strong Lewis
    D
    Tribasic and weak Bronsted acid

  • H_(3)BO_(3) is

    A
    monobasci and weak Lewis acid
    B
    monobasic and weak Bronsted acid
    C
    monobasic and strong Lewis acid
    D
    tribasic and weak Bronsted acid

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