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Important ore of boron is ……….....

Important ore of boron is ………..

A

bauxite

B

borosilicate

C

borax

D

`beta`- tetragonal

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The correct Answer is:
C
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FULL MARKS-p-BLOCK ELEMENTS -I-Additional Questions ( CHOOSE THE CORRECT ANSWER ):
  1. Some elements exist in more than one crystalline or molecular forms in...

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  2. How many allotropes possible for boron?

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  3. Important ore of boron is ………..

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  4. Less reactive elements in boron family is ………………… .

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  5. More toxic element in boron family is …………. .

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  6. Boron does not react directly with ……………… .

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  7. Borontrifluoride reacts with sodium hydride at 450 K gives…………..

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  8. 2B+N(2)overset(Delta)to A Identify A

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  9. Boron reacts with fused sodium hydroxide to forms………………

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  10. Which isotope is used as moderator in nuclear reactors?

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  11. Borax is ………………. In nature.

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  12. Which compound is used as flux in metallurgy ?

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  13. The trialkylborate on reaction with sodiumhydride in tetrahydrofuran t...

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  14. Compounds used as an eye lotion ……..?

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  15. Which one of the following is highly reactive compound?

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  16. B(2)H(6)+6CH(3)OHtoA. Identify A

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  17. Which one of the following is called as inorganic benzene?

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  18. Compound contains two centred two elecrtron bond (2c-2e) is ………..

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  19. Diborane reacts with excess ammonia at high temperature to give…………………...

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  20. Consider the following statements, (i) Diborane contains two centre ...

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