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Explain why BF3 forms addition compound ...

Explain why `BF_3` forms addition compound with `NH_3` .

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CHHAYA PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE-WARM UP EXERCISE
  1. Aluminium chloride exists as a dimer-explain.

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  2. Give examples of two compounds in which there exists electrovalency, c...

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  3. Explain why BF3 forms addition compound with NH3 .

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  4. AlCl(3) forms a dimer but BC l(3) cannot-explain.

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  5. What do you understand by (i) bond length, (ii) bond dissociation enth...

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  6. Arrange the following compounds in increasing order of carbon-carbon ...

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  7. In water, the first and second O-H bond disociation enthalies are 502 ...

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  8. Arrange the given compounds in order of their increasing bond length: ...

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  9. Why does the value of bond angle increase with increase in electronega...

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  10. In which of the following molecules/ions all the bonds are not equal ?

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  11. Bond angles in PB r(3)(101.5^(@)),(PB l(3)(100^(@)) and PF(3)(97^(@)) ...

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  12. Bond angle in H(2)O is greater than that of H(2)S- explain.

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  13. Arrange the following in order of increasing radii. F, Cl, Br

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  14. Arrange the following molecules/ions in order of decreasing H-N-H bond...

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  15. Write down the main postulates of valence bond theory.

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  16. What do you understand by the term atomic orbital?

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  17. Explain why covalent bonds possess directional property.

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  18. What do you meann by a sigma and pi-bond?

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  19. Why are the pi-bonds weaker and more reactive than the sigma-bonds?

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  20. Arrange (s-s), (s-p) and (p-p) sigma-bonds in order of decreasing bond...

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