Free Carboxylic Acids MCQs with Answers
550 Carboxylic Acids MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Carboxylic acids are named and studied through the combined effects of the carbonyl and hydroxyl groups, their preparation, acidity and hydrogen bonding. Reactions include neutralisation, esterification, reduction and conversion into acid chlorides, anhydrides, esters and amides, with emphasis on how these derivatives interconvert.
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Read the Carboxylic Acids notesFree MDCAT chapter notes with key terms550 questions · page 10 of 28
- A. Acetic acid
- B. Formic acid
- C. Valeric acid
- D. Caproic acid
Explanation: Formic acid is a colorless, fuming liquid with a pungent acrid odor with the chemical formula HCOOH.
Correct answer: Formic acid- A. Acetic acid
- B. Picric acid
- C. Oxalic acid
- D. Formic acid
Explanation: For this question, we must assume CHCH to be ethyne. The (O) implies oxidation and water indicates that the oxidizing agent is dilute.
Correct answer: Oxalic acid- A. I < II < III
- B. III < II < I
- C. III > II < I
- D. I = II = III
Explanation: In the case of the esterification of alcohol, there is the cleavage of the O-H bond.
Correct answer: III < II < I- A. It is a colorless liquid with a boiling point of 118° C.
- B. It is miscible with water, alcohol and ether in all proportions.
- C. It is used in the manufacture of pickles.
- D. Takes part in the metabolism of one-carbon compounds.
Explanation: Ethanoic acid, often known as acetic acid, has a strong vinegar odor and a sour flavor. It is a colorless, transparent liquid.
Correct answer: Takes part in the metabolism of one-carbon compounds.- A. Acetic acid
- B. Bitter
- C. Citric
- D. Vinegar
Explanation: Acetum another name for vinegar. a solution that has dilute acetic acid as solvent.
Correct answer: Vinegar- A. R - COOH
- B. R - COR
- C. R - COOR
- D. R - COH
Explanation: Esters have the general formula RCOOR′, where R may be a hydrogen atom, an alkyl group, or an aryl group, and R′ may be an alkyl group or…
Correct answer: R - COOR- A. Aldehydes
- B. Ketones
- C. Carboxylic acids
- D. Alcohols
Explanation: It is factual that compounds ending with -COOH are carboxylic acids such as methanoic acid, butanoic acid etc.
Correct answer: Carboxylic acids- A. Beta-hydroxy carboxylic acids
- B. Acids having one extra no of carbon atom
- C. Acids having one carbon less than the starting material
- D. Alpha-hydroxy acids
Explanation: Hydrolysis of nitriles produces a carboxylic acid with one extra carbon.
Correct answer: Acids having one extra no of carbon atom- A. RCOOH
- B. ArCOOH
- C. PhCOOH
- D. None of these
Explanation: The general formula of aliphatic carboxylic acids is R-COOH.
Correct answer: RCOOH- A. Alkoxy acid
- B. Alkanoic acid
- C. Alkyl carboxylic acid
- D. Alkoxylate acid
Explanation: In IUPAC nomenclature, carboxylic acids are named as alkanoic acid.
Correct answer: Alkanoic acid- A. H₂/Ni
- B. Pd/C
- C. NaBH₄
- D. LiAlH₄
Explanation: Reduction of carboxylic acids to alcohols can only take place in the presence of strong reducing agents, such as LiAlH4.
Correct answer: LiAlH₄- A. Carbohydrates
- B. Lipids
- C. Proteins
- D. DNA
Explanation: Proteins are large, complex macromolecules made up of long chains of amino acids.
Correct answer: Proteins- A. Ethers
- B. Carboxylic acids
- C. Aldehydes
- D. Alcohols
Explanation: As can be seen from the reaction mechanism below, nitrile hydrolysis yields carboxylic acids and the liberation of an ammonium/ammonia…
Correct answer: Carboxylic acids- A. PCl5
- B. POCl3
- C. CH3Cl
- D. HCl
Explanation: Production of acyl chloride from a carboxylic acid can be used using the following reagents, PCl3, PCl5, SOCl2 (thionyl chloride).
Correct answer: PCl5- A. Ethanoic acid
- B. Pentanoic acid
- C. Hexanoic acid
- D. Butanoic acid
Explanation: Smaller carboxylic acids (C1 to C5) are soluble in water, whereas larger carboxylic acids (C6 and above) are less soluble due to the…
Correct answer: Ethanoic acid- A. OH group is given number 1 position
- B. Carboxylic acid is given number 1 position
- C. COOH is given number 3 position
- D. COOH is given number 4 position
Explanation: Option B: This is because it is first in the priority order.Option A) OH group is given number 1 position is incorrect because the -OH…
Correct answer: Carboxylic acid is given number 1 position- A. Formic acid
- B. Acetic acid
- C. Benzoic acid
- D. Amino acid
Explanation: The carboxylic acid used in medicine as a local irritant is Formic acid (HCOOH).Formic acid (also found in ant stings) causes redness and…
Correct answer: Formic acid- A. Ethanoic acid
- B. Butanoic acid
- C. Adipic acid
- D. Phthalic acid
Explanation: Option A) Ethanoic acid, also known as acetic acid, is a simple carboxylic acid but it is not aromatic.
Correct answer: Phthalic acid- A. Butyric acid
- B. Phthalic acid
- C. Lactic acid
- D. Acetic acid
Explanation: Acetic acid lowers the pH of food, giving it an acidic taste. For example, salt and vinegar chips.
Correct answer: Acetic acid- A. Small sizes
- B. Polarity of C-O bond
- C. H-bonding
- D. Dipole-Dipole interactions
Explanation: Carboxylic acids exist as dimers due to intermolecular hydrogen bonding, which is not broken completely even in the vapor phase.
Correct answer: H-bonding