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Moissan boron is...

Moissan boron is

A

Morphous boron of ultra purity

B

Crystalline boron of ultra purity

C

Amorphous boron of low purity

D

Crystalline boron of low purity

Text Solution

Verified by Experts

The correct Answer is:
C
Moissan boron is amorphous boron, obtained by reduction of `B_(2)O_(3)` with Na or Mg. it has 95-98 % boron and is black in colour.
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ERRORLESS -S AND P BLOCK ELEMENTS-Ordinary thinking (Boron family)
  1. Boron is unable to form BF(6)^(3-) because of

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  2. Alumina is

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  3. Moissan boron is

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  4. Which one of the following exists in the oxidation state other than +3...

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  5. Aluminium is more reactive than iron. But aluminium is less easily cor...

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  6. Aluminium vessels should not be washed with materials containing washi...

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  7. Aluminium oxide is not reduced by chemical reactions since

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  8. In Goldschmidt aluminothermic process, thermite mixture contains:

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  9. Which metal has a greater tendency to form metal oxide

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  10. In which of the following molecules is hydrogen bridge bond present ?

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  11. In borax the number of B-O-B links and B-OH bond present are, respecti...

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  12. Which statement is incorrect

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  13. Correct formula of aluminium nitride is

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  14. Which metal burn in air at high temperature with the evolution of much...

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  15. Ga is below Al in the periodic table, but atomic radius of Ga is less ...

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  16. Crystalline metal can be transformed into metallic glass by

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  17. An element A dissolves both in acid and alkali. It is an example of

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  18. Which one of the following is correct statement ?

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  19. In the purification of bauxite by Hall's process

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  20. Assertion: Boron is metalloid. Reason : Boron shows metallic nature...

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