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Explain why BF(3) is a weaker Lewis acid...

Explain why `BF_(3)` is a weaker Lewis acid than `BCl_(3)`.

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Account for the following observations (a) AlCl_(3) is a Lewis acid (b) Though fluorine is more electronegative than chlorine yet BF_(3) is a weaker Lewis acid than CI_(3) (c) PbO_(2) is a stronger oxidising agent than SnO_(2) (d) The +1 oxidation state of thallium is more stable than its +3 state.

Statement-1 BF_(3) is a weaker Lewis acid than BCl_(3) Statement -2: BF_(3) molecule is stabilized to a greater extent than BCl_(3) by p pi -p pi back bonding.

Assertion BF_(3) is a weaker Lewis acid than BCI_(3) Reasoning In BF_(3) molecule, back bonding (ppi-ppi) is stronger than in BCI_(3) .

Assertion: BF_(3) is weaker lewisi acid than BC l_(3) . Reason: BF_(3) is less electron deficient thann BCl_(3) .

DINESH PUBLICATION-P BLOCK ELEMENTS (GROUP 13 AND 14 )-Boron family
  1. What is diagonal relationship ? Discuss the diagonal relationship betw...

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  2. What is diagonal relationship ? Discuss the diagonal relationship betw...

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  3. Explain why BF(3) is a weaker Lewis acid than BCl(3).

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  4. Name the group 13 element which forms most stable compounds in +1 oxid...

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  5. Anhydrous AlCl(3) is covalent but hydrated AlCl(3) is electrovalent. ...

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  6. Which elements constitute group 14 of periodic table? Write their elec...

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  7. Assertion (A) : Maximum covalency of carbon is four . Reason (R) : ...

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  8. At room temperature, CO(2) is a gas while SiO(2) is a solid because

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  9. Why is SnCl(2) more easly formed than SnCl(4)?

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  10. SiF(6)^(2-) exist but not CF(6)^(2-) explain why ?

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  11. Carbon and silicon are mainly tetravalent while germanium, tin and lea...

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  12. Trisilicylamine is a weaker base than trimethylamine. Explain.

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  13. Trisilicylamine is a weaker base than trimethylamine. Explain.

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  14. Elemental silicon does not form a graphtie like structure. Explain.

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  15. Why are silicones? How are they prepared? Give their important applica...

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  16. At room temperature, CO(2) is a gas while SiO(2) is a solid because

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  17. PbCl(4) is less stable than SnCl(4) but PbCl(2) is more stable than Sn...

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  18. C Cl(4) does not show hydrolysis but SiCl(4) is readily hydrolysed bec...

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  19. How does carbon differ from rest of the elements in the group?

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  20. Carbon dioxide is a gas but silica is a solid because

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