What happens when ethyl chloride is treated with bleaching powder?

Dear Mohini,

 Ethanol (ethyl alcohol) or propanone (acetone) when treated with bleaching powder gives chloroform. This reaction is known as haloform reaction.

• From ethanol

The reaction occurs as the bleaching powder reacts with water giving chlorine and calcium hydroxide as:

The reaction proceeds in three steps:

First step is the oxidation of ethyl alcohol to give acetaldehyde.

Second is chlorination of acetaldehyde to form chloral (trichloroethanal)

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