why are alkyl halides ,though polar,immiscible in water?????

Answer 1

If two liquids are miscible, that means that they can be combined in any proportion into a homogenous mixture. Ethanol and water for example. Alkyl halides are polar, and because of this, low molecular mass alkyl halides are soluble, but not miscible. The carbon, halogen bond isn't polar enough to make the compounds miscible. It's not polar enough to form hydrogen bonds (except when the halogen is flourine). And remember, for something to mix with water, it has to pull apart it's hydrogen bonds.

Answer 2

1

Answer 3

This is because they are not able to hydrogen-bond with water. The moderate energy required to separate the alkyl halide molecules is far less than the energy required to separate hydrogen-bonded water molecules, and there is no good return on the investment, so to speak.