NEETChemistryCarboxylic Acid Derivatives
Assertion : HCOOH has less ( pK _ a ) than ( C ₆ H ₅ COOH ). Reason : In ( C ₆ H ₅ COOH , C ₆ H ₅ ) - group shows-I effect not +R effect.
Options
- AIf both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
- BIf both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark
- CIf Assertion is true statement but Reason is false, then mark (3).
- DIf both Assertion and Reason are false statements, then mark (4).
Correct answer
C. If Assertion is true statement but Reason is false, then mark (3).
Step-by-step solution
Acidic strength order ( HCO ₂ H > C ₆ H ₅ CO ₂ H ) ( K _ a ) order ( HCO ₂ H > C ₆ H ₅ CO ₂ H ) But ( C ₆ H ₅ ) - group shows +I & +R effect So, ( pK _ a ) order ( HCO ₂ H < C ₆ H ₅ CO ₂ H )