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What are silicones ?...

What are silicones ?

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(i) For answer,consult section 11.11
(ii) For anwer,consult section 11.4
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DINESH PUBLICATION-P BLOCK ELEMENTS (GROUP 13 AND 14 )-Short answer type
  1. Give reasons for the following (a) C Cl(4) is immiscible in water, w...

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  2. Explain the following (a) CO(2) is a gas whereas SiO(2) is a solid ...

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  3. The +1 oxidation state in group 13 and +2 oxidation state in group 14 ...

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  4. Carbon and silicon both belong to the group 14, but inspite of the sto...

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  5. If a trivalent atom replaces a few silicon atoms in three dimensional ...

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  6. When BCl(3) is treated with water, it hydrolyses and forms [B(OH)(4)]^...

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  7. Aluminium dissovles in mineral acids and aqueous alkalies and thus sho...

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  8. Explain the following : (a) Boron has high melting and boiling point...

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  9. Identify the compound A, X and Z in the following reactions: (i) A+2...

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  10. Complete the following chemical equations: (i) z+3LiAlH(4)rarrX+3Li...

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  11. Describe the general trends in the following properties of the element...

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  12. Account for the following observation: (i) AlCl(3) is Lewis acid (...

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  13. When aqueous solution of borax is acidified with hydrochloric acid, a ...

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  14. Three pairs of compounds are given below, identify that compound in e...

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  15. BCl(3) exists as monomer whereas AlCl(3) is dimerised through halogen ...

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  16. Explain why BF(3) exist but BH(3) does not.

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  17. What are silicones ?

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  18. A compound (A) of boron reacts with Nme(3) to give an adduct (B) which...

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  19. A non-metallic element of group 13, used in making bullet prrof vests ...

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  20. A tetravalent element forms monoxide and dioxide with oxygen. When air...

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