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Give a labouratory method to prepare dia...

Give a labouratory method to prepare diaborance and ist some properties of diborance.

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V PUBLICATION-THE p - BLOCK ELEMENTS-QUESTION BANK
  1. Diamond is hard and non conducting while graphite is soft and conducti...

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  2. Give reason for (i) diamond is a covalent compound yet its melting p...

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  3. Give a labouratory method to prepare diaborance and ist some propertie...

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  4. Why would high pressure be an expected condition for the transformatio...

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  5. What are fullerences? How are they prepared?

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  6. Gallium has higher ionisation enthalpy than aluminium. Explain why?

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  7. Borax gets hydrolysed to give

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  8. Orthoboric acid on strong heating to red hot gives. metaboric acid bo...

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  9. The aqueous solution of borax is

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  10. Carborundum is

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  11. The high temperature polymers of silicon are called silicates silicon...

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  12. Which of the following is not the form of silica? cassiterite, cri...

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  13. The element having maximum abundance in earths crust is

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  14. Hybridisation of boron in B2H6 is -----

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  15. Boric acid is polymeric due to -----

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  16. The Elements of group 14 show ----- oxidation states

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  17. Boron is a : metal, non-metal, metalloid, alloy

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  18. Explain the action of heat on boric acid.

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  19. The compounds of boron with hydrogen are called : borides, boranes, di...

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  20. Orthoboric acid on strong heating to red hot gives. metaboric acid bo...

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