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Question

CH3O||CCH3 X2,OH−−−− CH3O||CCH3

X3CO||CCX3

The trihaloketone also undergoes hydrolysis in present of OH forming

CH3O||CCH3 OH−− CH3O||COCHX3
Halogen reaction can be used for preparing -COOH from methyl ketones, which halogen is best suited for this purpose?

A
Cl2
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B
Br2
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C
either of the two
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D
I2
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Solution

The correct option is C either of the two
Methyl ketones can be converted into carboxylic acids by haloform reaction. For this purpose, either chlorine of bromine are best suited. Both chloroform and bromoform are immiscible with water.
Their separation from the aqueous solution of the carboxylate anion is easy.

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