Free Nomenclature, Structure and Preparation MCQs with Answers
37 Nomenclature, Structure and Preparation 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 prepared by oxidising primary alcohols or aldehydes, hydrolysing nitriles, esters and amides, and carbonating suitable organometallic compounds. Their structures, IUPAC naming, resonance stabilisation and acidic character explain why carboxylic acids differ from alcohols and phenols, despite all containing oxygen and hydrogen.
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37 questions · page 2 of 2
- A. Butanol
- B. Butanoic acid
- C. Butanone
- D. All of these
Explanation: Butanol is the correct starting compound because it is a primary alcohol.
Correct answer: Butanol- A. Alcohol
- B. Ketone
- C. Ether
- D. Aldehyde
Explanation: Aldehydes are easily oxidized to carboxylic acids with 0.5 moles of oxygen per mole of aldehyde, consistent with the reaction conditions…
Correct answer: Aldehyde- A. Periodic acid:
- B. Lead tetraacetate:
- C. Acidified KMnO4:
- D. Both (A) & (B):
Explanation: Ethylene glycol can be oxidized into a carboxylic acid using acidified potassium permanganate (KMnO4).
Correct answer: Acidified KMnO4:- A. Ants
- B. Butter
- C. Milk
- D. Vinegar
Explanation: Acetic acid is typically isolated from vinegar, which is a dilute solution of acetic acid that is produced by the fermentation of ethanol…
Correct answer: Vinegar- A. fats and oils
- B. proteins and oils
- C. fats and proteins
- D. fats only
Explanation: Fats and oils are hydrolyzed to form aliphatic monocarboxylic acids.
Correct answer: fats and oils- A. Aromatic compounds
- B. Alcohols
- C. Carboxylic acid
- D. Ethers
Explanation: When carbon dioxide (CO₂) reacts with a Grignard reagent (RMgX), a carboxylic acid is formed.
Correct answer: Carboxylic acid- A. Butane dioic acid
- B. Pentane dioic acid
- C. Propane dioic acid
- D. Hexane dioic acid
Explanation: The IUPAC have fix rules which help us to name compounds universally. By using that fix rules we named the Glutaric acid as Pentane dioic…
Correct answer: Pentane dioic acid- A. citric acid
- B. ethanoic acid
- C. oxalic acid
- D. methanoic acid
Explanation: The common names of carboxylic acids were derived from the source from which they are isolated.
Correct answer: ethanoic acid- A. n-Propyl Magnesium Bromide
- B. Iso-propyl magnesium Bromide
- C. N-Butyl Magnesium Bromide
- D. Neo-Butyl Magnesium Bromide
Explanation: Neopentylmagnesium bromide, often referred to as neo-butyl magnesium bromide, is a Grignard reagent derived from neopentyl bromide.
Correct answer: Neo-Butyl Magnesium Bromide- A. Nitrogen
- B. Carbon dioxide
- C. Formaldehyde
Explanation: Carboxylic acids can be prepared by reacting Grignard reagents (RMgX, where R is an alkyl or aryl group and X is a halogen) with carbon…
Correct answer: Carbon dioxide- A. Palmitic acid
- B. Stearic acid
- C. Propionic acid
- D. Valeric acid
Explanation: The explanation for this question will be added soon.
Correct answer: Valeric acid- A. 2-bromo propanal
- B. 3- bromo propenoic acid
- C. 2-bromo butanoic acid
- D. 2-bromo propanoic acid
Explanation: The explanation for this question will be added soon.
Correct answer: 2-bromo propanoic acid- A. Carboxylic Acid
- B. Acid Amide
- C. Cyanohydride
- D. Formaldehyde
Explanation: A is correct as hydrolysis of a cyano group results in the formation of a carboxylic acid (fact)B is incorrect as acid amide is not a…
Correct answer: Carboxylic Acid- A. Primary alcohol
- B. Secondary alcohol
- C. Acetone
- D. Carboxylic acid
Explanation: When a Grignard reagent reacts with carbon dioxide, the reaction leads to the formation of a carboxylate salt as an intermediate.
Correct answer: Carboxylic acid- A. Hydroxyl group
- B. A hydroxyl group and carboxyl group
- C. A carboxyl group
- D. A carboxyl and aldehyde group
Explanation: A carboxyl group: This option is correct. Carboxylic acids are organic compounds that contain a carboxyl group (−COOH).
Correct answer: A carboxyl group- A. 136 PM, 123 PM
- B. 123 PM and 136 PM
- C. 136 PM, 136 PM
- D. 123 PM and 123 PM
Explanation: The correct answer is 123 PM for the C = O bond and 136 PM for the C-O bond.
Correct answer: 123 PM and 136 PM- A. CH3COOH +NH3
- B. CH3COOH +NH4Cl
- C. CH3COCl +NH3
- D. CH3CONH2
Explanation: Students should remember that nitriles react with aqueous HCl in a hydrolysis reaction to form the corresponding carboxylic acid and salt…
Correct answer: CH3COOH +NH4Cl