Direct attachment of groups such as phenyl or vinyl to the carboxylic acid, increases the acidity of corresponding carboxylic acid.Statement-II : Greater electronegativity of sp2 hybridised carbon, attached with carboxyl group enhance its acidic strength.A Statement-I and II both are correct and statement-II is correct explanation of statement-I B Statement-I and II both are correct but statement-II is not correct explanation of statement-I C Statement-I is correct but statement-II is false. D Both Statement-I and II are incorrect.
Question
Direct attachment of groups such as phenyl or vinyl to the carboxylic acid, increases the acidity of corresponding carboxylic acid.Statement-II : Greater electronegativity of sp2 hybridised carbon, attached with carboxyl group enhance its acidic strength.A Statement-I and II both are correct and statement-II is correct explanation of statement-I B Statement-I and II both are correct but statement-II is not correct explanation of statement-I C Statement-I is correct but statement-II is false. D Both Statement-I and II are incorrect.
Solution
The statement is discussing the effect of attaching groups such as phenyl or vinyl to a carboxylic acid on its acidity.
Statement-I states that the direct attachment of these groups increases the acidity of the carboxylic acid.
Statement-II explains this by stating that the greater electronegativity of the sp2 hybridized carbon, which is attached to the carboxyl group, enhances its acidic strength.
To determine the correct answer, we need to evaluate the validity of both statements.
Statement-I is supported by the fact that the presence of electron-withdrawing groups, such as phenyl or vinyl, can stabilize the negative charge on the carboxylate ion, making it easier to dissociate and increasing the acidity of the carboxylic acid.
Statement-II is also supported by the fact that sp2 hybridized carbon atoms are more electronegative than sp3 hybridized carbon atoms. This increased electronegativity can enhance the acidity of the carboxylic acid by pulling electron density away from the carboxyl group, making it more acidic.
Therefore, the correct answer is A) Statement-I and II both are correct, and statement-II is the correct explanation of statement-I.
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