Advertisements
Advertisements
प्रश्न
Explain what happens when boric acid is heated.
Advertisements
उत्तर
On heating orthoboric acid (H3BO3) at 370 K or above, it changes to metaboric acid (HBO2). On further heating, this yields boric oxide B2O3.
\[\ce{H3BO3 ->[\Delta][370 K] \underset{Metaboric acid}{HBO2} ->[\Delta][red hot] \underset{\text{Boric oxide}}{B2O3}}\]
संबंधित प्रश्न
Is boric acid a protic acid? Explain.
Explain the following reaction.
Hydrated alumina is treated with aqueous NaOH solution.
A certain salt X, gives the following results.
- Its aqueous solution is alkaline to litmus.
- It swells up to a glassy material Y on strong heating.
- When conc. H2SO4 is added to a hot solution of X, white crystal of an acid Z separates out.
Write equations for all the above reactions and identify X, Y and Z.
Boric acid is polymeric due to ______.
Boric acid is an acid because its molecule ______.
Explain the nature of boric acid as a Lewis acid in water.
When aqueous solution of borax is acidified with hydrochloric acid, a white crystalline solid is formed which is soapy to touch. Is this solid acidic or basic in nature? Explain.
Which of the following is a FALSE statement about boric acid, \[\ce{H3BO3}\]?
Aqueous solution of which of the following boron compounds will be strongly basic in nature?
Boric acid heated to red hot gives ______.
Which of the following compounds are formed when boron trichloride is treated with water?
On the addition of mineral acid to an aqueous solution of borax, the compound formed is ______.
Which one of the following methods is used to prepare borax crystals?
Boric acid (H3BO3) is ______.
The reaction of H3N3B3Cl3(A) with LiBH4 in tetrahydrofuran gives inorganic benzene (B). Further, the reaction of (A) with (C) leads to H3N3B3(Me)3. Compounds (B) and (C) respectively, are ______.
