Questions
Amorphous Boron obtained by the following steps.
What are A and B ?
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a
H2SO4,Al
b
HCl,C
c
HCl,Al
d
H2SO4 Mg
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Correct option is D
Following is the hydrolysis of borax.Na2B4O7+H2SO4+H2O→H3BO3Now Boric acid obtained is heated to obtain boric anhydride, followed by reduction with Mg. Boron obtained in this way is amorphous and 95-98% pure.H3BO3→B2O3→MgMgO+B
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