Carboxylic AcidsReactivity of Carboxylic Acid Derivatives21Choose the best answerThe correct decreasing order of reactivity toward nucleophilic acyl substitution is:AAcyl chloride > Acid anhydride > Ester > Carboxylic acidBEster > Acid anhydride > Acyl chloride > Carboxylic acidCCarboxylic acid > Ester > Acid anhydride > Acyl chlorideDAcid anhydride > Acyl chloride > Ester > Carboxylic acid Like 0 Discuss 0Share
Carboxylic AcidsAcidic Character and Inductive Effect22Choose the best answerThe correct decreasing order of acidity is:ACH₃COOH > ClCH₂COOH > CCl₃COOHBCCl₃COOH > ClCH₂COOH > CH₃COOHCClCH₂COOH > CH₃COOH > CCl₃COOHDCH₃COOH > CCl₃COOH > ClCH₂COOH Like 0 Discuss 0Share
Carboxylic AcidsHydrogen Bonding and Dimerization23Choose the best answerAcetic acid exists as a dimer in benzene because of:ACondensationBThe presence of the –COOH group onlyCThe presence of α-hydrogen atomsDIntermolecular hydrogen bonding Like 0 Discuss 0Share
UHS MDCAT 2023 ChemistryUHS MDCAT 2023 Past Paper#Carboxylic Acids#Preparation of Acyl Chlorides24Choose the best answerMr. Khan mix acetic acid with thionyl chloride. Which product is obtained? (UHS MDCAT 2023)ACH₃COO + SO₂ + HClBCH₃Cl + CH₃COClCCH₃COOCH₃ + SO₂DCH₃COCl + SO₂ + HCl Like 1 Discuss 0Share
Carboxylic AcidsAcidic Character and Resonance Stabilization25Choose the best answerCarboxylic acids are more acidic than alcohols mainly because:AThey have greater molecular mass.BTheir conjugate bases are stabilized by resonance.CTheir O–H bonds are always stronger.DThey have higher boiling points. Like 0 Discuss 0Share