Explain what happens when boric acid is heated.

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p-Block Elements - I

easy

Explain what happens when boric acid is heated.

Option A

Option B

Option C

Option D

Solution

On heating orthoboric acid $\left(\mathrm{H}_{3} \mathrm{BO}_{3}\right)$ at $370 \mathrm{~K}$ or above, it changes to metaboric acid $\left(\mathrm{HBO}_{2}\right)$. On further heating, this yields boric oxide $\mathrm{B}_{2} \mathrm{O}_{3}$.

$\mathrm{H}_{3} \mathrm{BO}_{3} \stackrel{370 \mathrm{~K}}{\longrightarrow} \mathrm{HBO}_{2} \longrightarrow \mathrm{B}_{2} \mathrm{O}_{3}$

Standard 11

Chemistry

Which of the following is an electron deficient molecule?

medium

Aluminum dissolves in mineral acids and aqueous alkalis and thus shows amphoteric character. A piece of aluminum foil is treated with dilute hydrochloric acid or dilute sodium hydroxide solution in a test tube and on bringing a burning match stick near the mouth of the test tube, a pop sound indicates the evolution of hydrogen gas. The same activity when performed with concentrated nitric acid, reaction doesn't proceed. Explain the reason.

medium

The structure of aluminium bromide is best represented as :

medium

Describe the shapes of $BF $$_{3}$ and $BH _{4}^{-}$. Assign the hybridisation of boron in these species.

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easy

Explain what happens when boric acid is heated.

Solution

Similar Questions

Which of the following is an electron deficient molecule?

The structure of aluminium bromide is best represented as :

Describe the shapes of $BF $$_{3}$ and $BH _{4}^{-}$. Assign the hybridisation of boron in these species.

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