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Question
How will you convert boric acid to boron nitride?
Solution
Fusion of urea with boric acid B(OH)3, in an atmosphere of ammonia at 800 – 1200 K gives
\[\ce{\underset{\text{(Boric acid)}}{B(OH)3} + NH3 ->[\Delta] \underset{\text{(Boron nitride)}}{BN} + 3H2O}\]
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RELATED QUESTIONS
Boric acid is an acid because its molecule ____________.
Match items in Column – I with the items of Column – II and assign the correct code.
| Column – I | Column – II |
| A. Borazole | 1. B(OH)3 |
| B. Boric acid | 2. B3N3H6 |
| C. Quartz | 3. Na2[B4O5(OH)4]8H2O |
| D. Borax | 4. SiO2 |
Describe the structure of diborane.
Write a short note on hydroboration.
Give one example for the following.
Icosogens
Complete the following reaction.
\[\ce{B(OH)3 + NH3 ->}\]
Complete the following reaction.
\[\ce{Na2B4O7 + H2SO4 + H2O ->}\]
Complete the following reaction.
\[\ce{B2H6 + 2NaOH + 2H2O ->}\]
Complete the following reaction.
\[\ce{B + NaOH ->}\]
A hydride of 2nd period alkali metal (A) on reaction with a compound of Boron (B) to give a reducing agent (C). identify A, B and C.
