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Give reasons Graphite is used as lubri...

Give reasons
Graphite is used as lubricant.

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Graphite is used as lubricant for it's soft and greasy nature due to the presence of layer's of hexagonal arrangement of carbon atoms in it's structure.
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PATHFINDER-SOME P-BLOCK ELEMENTS-QUESTION BANK
  1. What is the type of hybridisation of Boron in diborane ?

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  2. Give reasons Conc. HNO3 can be transported in aluminium container.

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  3. Give reasons Graphite is used as lubricant.

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  4. Give reasons Aluminium utensils should not be kept in water overnigh...

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  5. Give reasons CCl4 is used in fire extinguisher.

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  6. Give reasons Stannous chloride and Ferric chloride cannot be kept in...

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  7. Write balanced equation for the following BF3+LiHrarr

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  8. Write balanced equation for the following B2H6+H2Orarr

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  9. Write balanced equation for the following NaH+B2H6rarr

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  10. Write balanced equation for the following B2H6+ NH3rarr

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  11. Write balanced equation for the following Al4C3+12H2Orarr

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  12. Identify A,B, C, D in the following reactions.

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  13. What happens when silica is treated with HF ? Give equation.

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  14. A metal 'X' on treatment with NaOH forms a white precipitate (A) which...

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  15. Explain: Silicon forms Si F6^(2-) but corresponding fluoro compound ...

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  16. Explain: BCl3overset("HOH")rarr[B(OH)4] but AlCl3overset("HOH")under...

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  17. If the starting material for manufacture of silicones is RSiCl3 then w...

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  18. What is inorganic graphite? Why is it so called?

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  19. Why B-F bond lengths in BF3 and BF^-4 differ ?

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  20. PbCl2 is more stable than PbCl4 - Why?

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