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Say TRUE or FALSE. Boron in aqueous solu...

Say TRUE or FALSE. Boron in aqueous solution forms `B^(3+)` ion.

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V PUBLICATION-THE p - BLOCK ELEMENTS-QUESTION BANK
  1. Diborane is an important hydride of Boron a. During a class room disc...

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  2. What is dry ice?

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  3. Say TRUE or FALSE. Boron in aqueous solution forms B^(3+) ion.

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  4. How does sodium hydride react with diborảne?

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  5. What is the maximum covalency of silicon in its compounds?

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  6. Account for the following. (i) P b X2 is more stable than P b X4(X=C...

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  7. C O2' can be represented by the structure 'O=C=O' comment.

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  8. Diamond is hard and non conducting while graphite is soft and conducti...

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

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

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

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  12. What are fullerences? How are they prepared?

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

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  14. Borax gets hydrolysed to give

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

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  16. The aqueous solution of borax is

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  17. Carborundum is

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

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

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  20. The element having maximum abundance in earths crust is

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