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Compare R-X and R-H (alkyl halide and al...

Compare R-X and R-H (alkyl halide and alkane) in following respects (a) dipote moment
Solubility in `H_(2)O`,
(ii) Arrange RCl and RBr, Rl RCE in decreasing order of boiling point.

Text Solution

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(i) (a) Dipole moment: X (halide) is more electronegative than carbon hence bonding pair between carbon and X is attracted towards X.
Hence, `R-X(overset(delta+)R-overset(delta-)X)` is more polar than R-H. Thus dipole moment of R-X is greater than R-H.
(b) Solubility in `H_(2)O:R-X` is more polar than R-H, hence R-X can have H-bonding with `H_(2)O` that makes it more soluble in it than R-H
`overset(delta+)R-overset(delta-)X-overset(delta+)H-overset(delta-)OH`
(ii) For a given alkyl group, the boiling points and densities are proportional to the molecular weight, hence show a reagular gradation in the order
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