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Hardest compound of boron is...

Hardest compound of boron is

A

Boron nitride

B

Boron carbide

C

Boron silicide

D

Magnesiumboride

Text Solution

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The correct Answer is:
B
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V PUBLICATION-THE p - BLOCK ELEMENTS-QUESTION BANK
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  2. A l^(3+)' is not isoelectronic with (1)Ne (2)Na^+ (3)F^- (4)Ca^2+

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  3. Which one of the following elements has the highest melting point? (1)...

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  4. Orthoboric acid, H3BO3 is a

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  5. The hybridisation of boron in 'B F3' and 'BF4' respectively is sp^2, s...

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  6. Amorphous form of silica is : tridynite, cristobalite, fumed silica, ...

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  7. In silicon dioxide : each siliçon atom is surrunded by four oxygen ato...

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  8. Carborundum is

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  9. Which of the following statement about boric acid is false. : It acts ...

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  10. Which of the following statement about boric acid is false. : It acts ...

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  11. Boron trioxide can be reduced with........to get boron Carbon Hydroge...

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  12. When boron burns in air it forms:

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  13. Which compound among the following is an antiseptic? BCl3' H3 BO3' B...

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  14. The boron compound which is formed whena solution of borax is acidifie...

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  15. Which of the following shows a tendency of dimerisation:?BCl3 BF3 BB...

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  16. Which of the following is untrue regarding BF3 ? It is a Lewis acid , ...

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  17. Hardest compound of boron is

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  18. Which of the following is an acid anhydride.

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  19. Producer gas is a mixture of

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  20. Which is supposed to be the purest form of carbon? Fullerence Charcoa...

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