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प्रश्न
Explain what happens when boric acid is heated.
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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 Structure of Boric Acid.
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.
An aqueous solution of borax is _______.
Boric acid is an acid because its molecule ______.
Draw the structure of boric acid showing hydrogen bonding. Which species is present in water? What is the hybridisation of boron in this species?
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.
What are boranes? Give chemical equation for the preparation of diborane.
Which of the following is a FALSE statement about boric acid, \[\ce{H3BO3}\]?
Which is correct statement about diborane structure?
Aqueous solution of which of the following boron compounds will be strongly basic in nature?
In diborane ______.
When aqueous solution of AICl3 is concentrated, it furnishes crystals of ______.
Which one of the following methods is used to prepare borax crystals?
Borazine, also known as inorganic benzene, can be prepared by the reaction of 3-equivalents of “X” with 6-equivalents of “Y”. “X” and “Y”, respectively are ______.
