Draw structure of boric acid showing hydrogen bonding. Which species is present in water? hybridizat

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p-Block Elements - I

medium

Draw the structure of boric acid showing hydrogen bonding. Which species is present in water? What is the hybridizations of boron in this species?

Option A

Option B

Option C

Option D

Solution

It has a layer structure in which planar $\mathrm{H}_{3} \mathrm{BO}_{3}$ units are joined by hydrogen bonds forming hexagonal rings. Boric acid is a weak monobasic acid. It is not a protonic acid but acts as a Lewis acid by accepting electrons from a hydroxyl ion. In water, boric acid is present in the form of $\left[\mathrm{B}(\mathrm{OH})_{4}\right]^{-}$species. The hybridizations of boron in this species is $s p^{3}$. $\mathrm{B}(\mathrm{OH})_{3}+2 \mathrm{HOH} \rightarrow\left[\mathrm{B}(\mathrm{OH})_{4}\right]^{-}+\mathrm{H}_{3} \mathrm{O}^{+}$

Standard 11

Chemistry

The incorrect stability order of $+3$ and $+1$ states of $13^{th}$ group elements (boron family) is

medium

Identify the statement that is not correct as far as structure of diborane is concerned

medium

The $+1 -$ oxidation state in group $-13$ and $+2$ oxidation state in group $-14$ becomes more and more stable with increasing atomic number. Explain.

medium

The electrochemical extraction of aluminum from bauxite ore involves.

$(A)$ the reaction of $Al _2 O _3$ with coke ($C$) at a temperature $>2500^{\circ} C$.

$(B)$ the neutralization of aluminate solution by passing $CO _2$ gas to precipitate hydrated alumina $\left( Al _2 O _3 .3 H _2 O \right)$

$(C)$ the dissolution of $Al _2 O _3$ in hot aqueous $NaOH$.

$(D)$ the electrolysis of $Al _2 O _3$ mixed with $Na _3 AlF _6$ to give $Al$ and $CO _2$.

normal

(IIT-2022)

If $B-Cl$ bond has a dipole moment, explain why $BCl_3$ molecule has zero dipole moment.

easy

Draw the structure of boric acid showing hydrogen bonding. Which species is present in water? What is the hybridizations of boron in this species?

Solution

Similar Questions

The incorrect stability order of $+3$ and $+1$ states of $13^{th}$ group elements (boron family) is

Identify the statement that is not correct as far as structure of diborane is concerned

The $+1 -$ oxidation state in group $-13$ and $+2$ oxidation state in group $-14$ becomes more and more stable with increasing atomic number. Explain.

If $B-Cl$ bond has a dipole moment, explain why $BCl_3$ molecule has zero dipole moment.

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