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Boiling points of nitroalkanes are much ...

Boiling points of nitroalkanes are much higher than those of hydrocarbons of comparable mass - give reasons.

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Nitroalkanes are polar in nature `(mu = 3 - 4D)` and thus have greater dipolar attraction than hydrocarbons. This results in higher values of b.p. `(mu =" Dipole moment")`
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