MHT CET 2023 Chemistry question

Which of the following is formed when propene is heated with chlorine at high temperature?

(A)1,2-dichloropropane
(B)1-chloropropane
(C)2-chloropropane
(D)3-chloropropeneCorrect

Answer: (D)

Solution

Chlorine adds to the double bond of an alkene at low/ordinary temperature in an inert solvent (electrophilic addition), giving the vicinal dihalide 1,2-dichloropropane (option a). At high temperature (about 773 K) a free-radical substitution takes place instead: the allylic hydrogen (on the carbon next to

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Question ID VK-098052