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Q.

Which of the following statements is not correct?

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a

Phenol is a stronger acid than ROH

b

PhO is a stronger base than RO .

c

NaHCO3 does not react with phenol because it is less acidic than phenol

d

Na2CO3 reacts with phenol because it is more acidic than phenol

answer is B.

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Detailed Solution

(b) The negative charge on the alkoxide anion, RO– , is completely localised, but the negative charge on PhO is delocalised by extended p-bonding to the ortho and para ring positions. This makes PhO weaker base than RO– and PhOH a stronger acid than ROH. 

(c) The reaction of phenol with NaHCO3 would produce the following reaction

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Both the reactants are weaker than the corresponding species on the right side. Thus, the reaction would not proceed to the right side. 

(d) The reaction would be

Question Image

Both the products are weaker than the corresponding species on the left side. Thus, the reaction proceeds to the right side

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