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Which of the following is the hardest co...

Which of the following is the hardest compound of boron?

A

Boron oxide

B

Boron nitride

C

Boron carbide

D

Boron hydroxide.

Text Solution

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The correct Answer is:
C
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MODERN PUBLICATION-CHEMISTRY OF P - BLOCK ELEMENTS-Multiple Choice Questions (Level - II) (Comprehensive Qs)
  1. Which one of the following chlorides will not fume in air?

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  2. Iodine oxidises the S(2)O(3)^(2-) ion to :

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  3. Which of the following is the hardest compound of boron?

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  4. Nitrogen can be purified from the impurities of oxides of nitrogen and...

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  5. Phosphine prepared by the action of caustic soda on white phophorus is...

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  6. A gas that cannot be collected over water is :

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  7. Aluminium (III) chloride forms a dimer because :

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  8. Which element out of the following He, Ar, Kr and Xe forms least numbe...

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  9. The acid which forms two series of salts is :

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  10. The partial hyddrolysis of XeF(4) at low temperature gives :

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  11. Which of the following is not used as a pigment in paints?

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  12. Hydrolysis of one mole of peroxodisulphuric acid produces :

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  13. Basicity of orthophosphoric acid is :

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  14. White phosphorus (P(4)) does not have :

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  15. Which of the following is not correct order of the property mentioned?

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  16. PBr(5) in solid state exists as :

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  17. XeF(4) reacts with water at -80^(@)C to give :

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  18. Which of the following set does not have oxidation state +6 for S?

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  19. Which of the following has highest basicity?

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  20. Which of the following reaction does not produce phosphine?

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