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 24 of 28
- A. Benzyl acetate
- B. Octyl Acetate
- C. Amyl Butyrate
- D. Ethyl butyrate
Explanation: Option B is correct since octylacetate is classified as an ester that is formed from 1-octanol (octyl alcohol) and acetic acid.
Correct answer: Octyl Acetate- A. Water, Alcohol, Ether
- B. HCI, HBr, HI
- C. Bromine water
- D. All of these
Explanation: Acetic acid also known as ethanoic acid (CH3COOH) can form hydrogen bonds with water and alcohol since all three species have OH group.
Correct answer: Water, Alcohol, Ether- A. Benzoic Acid
- B. Propanoic acid
- C. Formic acid
- D. Picric acid
Explanation: Picric acid is 2,4,6-trinitrophenol. It does not contain a carboxylic group.
Correct answer: Picric acid- A. HCl
- B. H2SO4
- C. CH3COOH
- D. H3PO4
Explanation: Option C "CH3COOH" is the right option.Organic compounds are universally weaker acids .
Correct answer: CH3COOH- A. Alcohol
- B. Aldehyde
- C. Ketone
- D. All of these options are correct
Explanation: We can get carboxylic acids by the oxidation of alcohols, aldehydes, and ketones as follows: R-CH2-OH + O2 → K2Cr2O7, H2SO4RCOOH R-CHO+0…
Correct answer: All of these options are correct- A. Ethanol and sodium acetate
- B. Ethanol and acetic acid
- C. Ethanol only
- D. Formic acid
Explanation: In basic hydrolysis (saponification) of ethyl acetate:CH3COOC2H5 + NaOH → CH3COONa + C2H5OH→ Products: Sodium acetate (CH₃COONa) and…
Correct answer: Ethanol and sodium acetate467. Fatty acids are:
- A. Unsaturated dicarboxylic acid
- B. Long chain alkanoic acid
- C. Aromatic carboxylic acid
- D. Aromatic dicarboxylic acid
Explanation: Alkanoic acids are alkane-derived organic compounds that contain the carboxylate (-COOH) functional group and fatty acids are carboxylic…
Correct answer: Long chain alkanoic acid- A. Stearic acid
- B. Palmitic acid
- C. Oleic acid
- D. Linoleic acid
Explanation: This is the correct answer. Octadecanoic acid is the IUPAC name for stearic acid.
Correct answer: Stearic acid- A. An ester
- B. An acid
- C. An alcohol
- D. A soap
- E. A base
Explanation: Ethanol (alcohol) can be produced by fermentation and concentrated using fractional distillation.
Correct answer: An alcohol- A. Acid anhydride
- B. Carboxylic acid
- C. Amides
- D. Esters
Explanation: Aqueous acid chloride is a very acidic solution due to formation of a mixture of strong acid and a weak acid.
Correct answer: Carboxylic acid- A. Beta-hydroxy carboxylic acids
- B. Acids having one carbon more than the starting material
- 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 carbon more than the starting material- A. Beta-hydroxy carboxylic acids
- B. Acids, having one carbon more than the starting material
- C. Acids with one carbon less than the starting material
- D. Alpha-hydroxy acids
Explanation: The type of carboxylic acid produced from the hydrolysis of nitriles is acids, having one carbon more than the starting material.
Correct answer: Acids, having one carbon more than the starting material- A. Conc. H2SO4
- B. Purnice stone
- C. Pt
- D. Ni
Explanation: Esterification process is a slow process when it is performed at room temperature also the process does not complete at all in the room…
Correct answer: Conc. H2SO4- A. Butyric acid
- B. Barbaric acid
- C. lso-butyric acid
- D. Iso-Barbaric acid
Explanation: Butyric acid is the common name of butanoic acid. It is an oily, colorless liquid with an unpleasant odor.OPTION A:.
Correct answer: Butyric acid- A. Ester & Nitriles
- B. Nitriles & amines
- C. Alkenes & Alkynes
- D. Esters & Alcohols
Explanation: Esters hydrolyze to produce carboxylic acids by breaking the C-O ester linkage. Nitriles also hydrolyze to produce carboxylic acids.
Correct answer: Ester & Nitriles- A. Alcohol
- B. Aldehyde
- C. Ketone
- D. Both A and B
Explanation: Option A: primary alcohol gets oxidised to carboxylic acid when oxidising agents are added, such as potassium permanganate (KMnO4), in an…
Correct answer: Both A and B- A. Decreases with increase of volume
- B. Decreases with increase in molecular mass
- C. Increases with increase in molecular mass
- D. None of these options are correct
Explanation: Carboxylic acids become less soluble due to the larger hydrocarbon portion.
Correct answer: Decreases with increase in molecular mass- A. Ester and Nitriles
- B. Nitriles and amines
- C. Alkenes and Alkynes
- D. Ester and Alcohols
Explanation: Carboxylic acids are formed by hydrolysis of ESTERS AND NITRILES.
Correct answer: Ester and Nitriles- A. A
- B. B
- C. C
- D. D
Explanation: Z gives a fruity smell that means it is an ester. Esters are formed by reaction between carboxylic acid and alcohol.All three of are…
Correct answer: C- A. A
- B. B
- C. C
- D. D
Explanation: All of them are derivatives of acetic acid.
Correct answer: D