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The number of sp^2 hybridized boron atom...

The number of `sp^2` hybridized boron atoms in borax

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Borax should be formulated : `Na_2[B_4O_5(OH)_4]8H_2O`. Two borons are `sp^3` hybridised, while other two are `sp^2` hybridised.
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PATHFINDER-P-BLOCK ELEMENTS -QUESTION BANK
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  2. Match Column-I with Column-II

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  3. The number of sp^2 hybridized boron atoms in borax

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  6. In sheet silicate how many oxygen atoms of [SiO4]^(4-) are shared ?

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  7. Starting from boric acid, how would you prepare (i) meta and (ii) tetr...

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  8. Boron tribromide is stronger acid than boron trifluoride. Why ?

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  9. Can we prepare anhydrous AlCl3 by heating AlCl3. 6H2O ?

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  10. Aluminium fluoride is ionic while AlCl3 is covalent. Why ?

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  11. Explain the following "The ppi-ppi back bonding occurs in the halide...

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  12. Compound (X) on reduction with LiAlH4 gives a hydride (Y) containing 2...

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  13. Carbon tetrachloride is not affected but silicon tetrachloride is hydr...

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  14. Why Sn (II) is a reducing agent whereas Pb (II) is not ?

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  16. PbCl4 exist while PbBr4 and PbI4 do not exist.-Explain.

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  17. Borax structure contains

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  18. When orthoboric acid is heated strongly, it gives which of the followi...

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  19. Which compounds gives O2 on moderate heating ?

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  20. Amorphous B on heating in air forms

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