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NEET 2016
Exam
NEET
Year
2016
Subject
Chemistry
Chapter
p Block Elements (Group 13 & 14)

NEET 2016 · Chemistry · p Block Elements (Group 13 & 14)

Boric acid is an acid because its molecule

Boric acid is an acid because its molecule

Options

  1. Acontains replaceable H+{H}^{+} ion.
  2. Bgives up a proton.
  3. Caccepts OH−{OH}^{-} from water releasing proton.
  4. Dcombines with proton from water molecule.

Correct answer

C. accepts OH−{OH}^{-} from water releasing proton.

Step-by-step solution

Boric acid is an acid because its molecule accepts OH(−){OH}^{( - )} from water releasing proton. It acts as a Lewis acid because of the electron deficient nature of boron in boric acid.

B(OH)3+H2O→[B(OH)4](−)(aq)+H(+)(aq)B{\left(OH\right)}_{3} + {H}_{2}O \to {\left[B{\left(OH\right)}_{4}\right]}^{\left(-\right)}\left(aq\right) + {H}^{\left(+\right)} ( aq )
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