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 9 of 28
- A. Conc. H2SO4
- B. Pumice 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. OH-
- B. P
- C. Cl-
- D. H-
Explanation: In the given reaction, the nucleophile which attacks the carbon atom of acid (CH3COOH) is CI (chloride ion).
Correct answer: Cl-- A. 5
- B. 2
- C. 4
- D. 3
Explanation: There are five functional groups present in the given formula. of the dipeptide: Carboxylic acid [COOH) group: one at the N-terminus of…
Correct answer: 5- A. Nylon 6,6
- B. Adipic Acid
- C. PVA
- D. Polyester
Explanation: It is a polymer of 1.3-propanediol and terephthalic acid. The reactants are alcohol and acid, which shows the formation of an ester bond.
Correct answer: Polyester- A. CH3CH2COCH3
- B. C2H5COOH
- C. CH3COH
- D. CH3COOH
Explanation: Compound C is the most reactive because it has a simple carbonyl group with minimal electron donating influence, enhancing its…
Correct answer: CH3COH- A. Acetyl chloride (CH3COCl)
- B. Acetic anhydride ((CH3CO)2O)
- C. Acetamide (CH3CONH2)
- D. None of these
Explanation: All the listed compounds are derivatives of acetic acid based on their structural transformations.
Correct answer: None of these- A. Alkanoyl chloride
- B. Alkyl alkanoate
- C. Alkane amides
- D. Alkanal
Explanation: Carboxylic acid derivatives include acid chlorides (alkanoyl chloride), esters (alkyl alkanoate), and amides (alkane amides).
Correct answer: Alkanal- A. Cation
- B. Neutral Amino Acid
- C. Internal Salt
- D. Anion
Explanation: There is an internal transfer of a hydrogen ion from the COOH group to the NH2 group, leaving an ion with both a negative charge and a…
Correct answer: Internal Salt- A. RCOOH
- B. RCHO
- C. RCOR
- D. RCONH2
Explanation: Amide functional group is given by -CO-NH2.
Correct answer: RCONH2- A. Carboxylic acid
- B. Aldehyde
- C. Alkyl Halide
- D. Ketone
Explanation: When Grignard reagent reacts with CO2 it forms Carboxylic salt which undergoes protonation by aqueous acid to form a carboxylic acid.
Correct answer: Carboxylic acid- A. Acyl 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. KMnO4
- B. LiAlH4
- C. K2Cr2O4
- D. H2SO4
Explanation: For this reaction to take place, you need the proper reducing agent, which is only LiAlH4 i.e. option B.
Correct answer: LiAlH4- A. An ester
- B. An acid
- C. An alcohol
- D. A soap
- E. As base
Explanation: Ethyl alcohol can be obtained by fermentation of starch, fermentation of molasses and fractional distillation of pyroligneous acid…
Correct answer: An alcohol- A. PCl3
- B. PCl5
- C. CCl4
- D. SOCl2
Explanation: PCl3, PCl5, and SOCl2 can be used to add Cl atoms in place of the OH group.
Correct answer: CCl4- A. Two alcohols
- B. Carboxylic acid and alcohol
- C. Ketone and alcohol
- D. Aldehyde and alcohol
- E. All of these
Explanation: When a carboxylic acid is treated with an alcohol and an acid catalyst, an ester is formed (along with water):
Correct answer: Carboxylic acid and alcohol- A. HCOOH
- B. CH3COOH
- C. (CH3)2CHCOOH
- D. (CH3)3CCOOH
Explanation: Among the given acids, formic acid is the strongest acid.As the number of methyl groups increases, the electron releasing +I effect of…
Correct answer: HCOOH- A. Two alcohols
- B. Carboxylic acid and alcohol
- C. Ketone and alcoho
- D. Aldehyde and alcohol
Explanation: Esters are made by the reaction of a carboxylic acid with an alcohol, a process that is called esterification.
Correct answer: Carboxylic acid and alcohol- A. Carboxylic acid
- B. Aldehydes
- C. Ketones
- D. Esters
Explanation: The hydrolysis of nitriles, which are organic molecules containing a cyano group, leads to carboxylic acid formation.An example is given…
Correct answer: Carboxylic acid- A. Dehydration
- B. Reduction
- C. Oxidation
- D. Esterification
Explanation: Acetic anhydride can be prepared by the dehydration of acetic acid at 800°C so, option A is correct.The reduction of acetic acid doesn't…
Correct answer: Dehydration- A. Ni / H2
- B. NaBH4
- C. P / HI
- D. LiAlH4
Explanation: The reduction of a carboxylic acid to an alkane typically requires a strong reducing agent.
Correct answer: P / HI