SK025 Chapter 10: Carboxylic Acid

Which interaction has the greatest effect on the physical properties of carboxylic acids?

• A. Covalent bond

• B. Hydrogen bond

• C. VanderWaals force

• D. Dipole-dipole force

The general formula for an ester is:-

• A. ROR

• B. RCOR

• C. RCOOH

• D. RCOOR

Which two classes of compounds is best suited to prepare an amide in a laboratory?

• A. Aldehyde and amine

• B. Carboxylic acid and amine

• C. Acid chloride and amine

• D. Alkene and amine

A carboxylic acid can be directly synthesized by a reaction between a Grignard reagent and

• A. Pyridine

• B. A ketone

• C. Formaldehyde

• D. Carbon dioxide

X: CH2CICHCICOOH

Y: CH3CCI2COOH

Z: CH3CF2COOH

Select the correct order of acidity for the carboxylic acids above.

• A. X > Y > Z

• B. Z > Y > X

• C. Y > Z > X

• D. Y > X > Z

What is R?

CH₃CH₂COH + R --> CH₃CH₂COOH

• A. NaBH₄

• B. LiAlH₄

• C. Na₂Cr₂O₇ / H⁺

• D. Grignard reagent

Which of the following organic compound react most vigorously with ammonia?

• A. CH₃COOH

• B. CH₃COCI

• C. CH₃COCH₃

• D. (CH₃CO)₂O

CH₃CH=CHCH₂CH₂OH --> CH₃CH=CHCH₂COOH

The most suitable reagent for this reaction is

• A. NaBH₄

• B. LiAlH₄

• C. H₂,Pt

• D. PCC

Which sequence of reaction will convert 1-bromopropane to n-butanoic acid.

• A. 1. NaCN 2.H⁺/H₂O

• B. 1. Mg/ether 2.CH₂O

• C. 1. CH₃MgBr 2.H⁺/H₂O

• D. 1.NaOH 2.KMnO₄, heat

The boiling point for ethanoic acid is higher than propanol even when both these molecules have the same molecular mass. This is because

• A. Ethanoic acids can form dimmers through hydrogen bonding.

• B. The hydrophobic group is propanol is longer than that of ethanoic acid.

• C. Propanol molecules cannot form hydrogen-bonds.

• D. The van der Waals forces between ethanoic acids are stronger.