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Why does boron trifluoride behave as a L...

Why does boron trifluoride behave as a Lewis acid?

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The B atoms in `BF_(3)` has only 6 electrons in the valence shell and needs two more electrons to complete its octet. Therefore, it easily accepts a pair of electrons from nucleophiles such as `F^(-), (C_(2)H_(5))_(2)O, RCH_(2)OH`, etc. and thus behaves as a Lewis acid.
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PRADEEP-SOME p-BLOCK ELEMENTS-NCERT QUESTIONS AND EXERCISES WITH ANSWERS (NCERT EXERCISES)
  1. Discuss the pattern of variation in the oxidation states of (a)B to TI...

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  2. How can you explain higher stability of BCI(3) as compared to TICI(3)?

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  3. Why does boron trifluoride behave as a Lewis acid?

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  4. Consider the compounds, BCl(3) and C Cl(4).How will they behave with w...

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  5. Is boric acid a protic acid? Explain.

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  6. Explain what happens when boric acid is heated.

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  7. Describe the shapes of BF(3) and BH(4)^(ө). Assign the hybridisation o...

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  8. Write reaction of justify amphoteric nature of aluminium.

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  9. What are electron-deficient compounds? Are BCl(3) and SiCl(4) electron...

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  10. Write the resonance structure of CO(3)^(2-) and HCO(3)^(ө).

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  11. What is the state of hybridisation of carbon in (a)CO(3)^(2-), (b) dia...

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  12. Explain the difference in properties of diamond and graphite on the ba...

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  13. Rationalise the given statements and give chemical reactions. a. Lea...

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  14. Suggest reasons why the B–F bond lengths in BF(3) (130 pm) and BF(4 )^...

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  15. If B-Cl bond has a dipole moment, explain why BCl(3) molecule has zero...

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  16. AlF(3) is insoluble in anhydrous HF but dissolves on addition of NaF. ...

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  17. Suggest a reason as to why CO is poisonous.

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  18. How is excessive content of CO(2) responsible for global warming?

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  19. Explain structures of diborane and boric acid.

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