POC-I-CARBOXYLIC ACID

The acidic strength of carboxylic acids is due to:

• Presence of -OH group

• Resonance stabilization of carboxylate ion

• Hydrogen bonding

• Hyperconjugation

Which of the following decreases acidity of benzoic acid?

• -NO₂ group (ortho)

• -Cl group (para)

• -CH₃ group (para)

• -CN group (meta)

The effect of distance of -Cl group from -COOH on acidity is:

• Acidity increases with distance

• Acidity decreases with distance

• Acidity remains constant

• First increases then decreases

Which of the following is the strongest acid?

• Acetic acid

• Formic acid

• Propionic acid

• Butyric acid

Acidity order of substituted benzoic acids is:

• o-Nitrobenzoic acid > p-Nitrobenzoic acid > m-Nitrobenzoic acid

• m-Nitrobenzoic acid > p-Nitrobenzoic acid > o-Nitrobenzoic acid

• p-Nitrobenzoic acid > o-Nitrobenzoic acid > m-Nitrobenzoic acid

• Benzoic acid > all substituted benzoic acids

Carboxylic acids evolve CO₂ with:

• NaOH

• NaHCO₃

• NH₃

• AgNO₃

Which test confirms an amide group?

• Ferric chloride test

• NaHCO₃ test

• Hydrolysis with alkali → evolution of ammonia

• Esterification

A fruity odor in organic compounds generally indicates:

• Alcohol

• Carboxylic acid

• Ester

• Amide

Which compound shows violet coloration with FeCl₃ solution?

• Benzoic acid

• Salicylic acid

• Citric acid

• Acetic acid

Which acid does not produce effervescence with NaHCO₃?

• Acetic acid

• Salicylic acid

• Oxalic acid

• Amide