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Which one of the following compounds is most acidic?

(a) Cl - CH2 - CH2 - OH

1 Answer

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Best answer

Correct option (c)

Explanation :

Phenols are much more acidic than alcohols,  due to the stabilisation of phenoxide ion by resonance.

-NO2 is the electron withdrawing group and helps in stabilizing the negative charge on the oxygen hence equilibrium shifts in forward direction and more H+ remove easily. Hence, it is most acidic.

-CH, is the electron donating group. Hence electron density increases, on the oxygen and destabilizes the product. Thus, equilibrium shifts in backward direction.

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