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Starting from boric acid, how would you ...

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

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PATHFINDER-P-BLOCK ELEMENTS -QUESTION BANK
  1. The minimum number of moles of HCl required to completely react with 1...

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

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

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

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

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

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

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

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

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

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  11. Graphite is a conductor but diamond is not a conductor. Explan.

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

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  13. Borax structure contains

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

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  15. Which compounds gives O2 on moderate heating ?

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  16. Amorphous B on heating in air forms

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  17. AlCl3 fumes in moist air because of

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  18. The dissolution of Al(OH)3 by a solution of NaOH results in the format...

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  19. Boron carbide B4C is widely used in

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  20. Which of the following compounds is optically active ?

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