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Amorphous boron of 95 % to 98 % purity is obtained by:

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Important Questions on The p-Block Elements

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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 124
Crystalline boron in small amounts may be obtained by:
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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 125
When orthoboric acid H3BO3 is heated, the residue left is:
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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 126
Borax is:
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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 127
Boric acid is polymeric due to:
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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 128
When borax is dissolved in water:
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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 129
The borax bead is chemically:
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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 130
Diborane reacts with water to form:
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Chemistry Crash Course NEET>Chapter 18 - The p-Block Elements>Level 1>Q 131
Water transported through lead pipes becomes poisonous due to the formation of: