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 27 of 28
- A. CH3COOH > ClCH2COOH > Cl2CHCOOH > Cl3CCOOH
- B. CH3COOH > Cl2CHCOOH > Cl3CCOOH > ClCH2COOH
- C. Cl3CCOOH > Cl2CHCOOH > ClCH2COOH > CH3COOH
- D. Cl3CCOOH > CH3COOH > Cl2CHCOOH > ClCH2COOH
Explanation: Chlorine is an electronegative atom and it pulls the electron density towards itself thus spreading the charge and making the conjugate…
Correct answer: Cl3CCOOH > Cl2CHCOOH > ClCH2COOH > CH3COOH- A. P2O5
- B. H2SO4
- C. +CH3COONa
- D. CH3COOH
Explanation: Acetyl chloride reacts with sodium acetate to give acetic anhydride.
Correct answer: +CH3COONa- A. Ester
- B. Amide
- C. Anhydride
- D. Amine
Explanation: Amines are derivatives of ammonia where H is replaced by one or more alkyl or aryl groups.
Correct answer: Amine- A. Steroids
- B. Carbohydrates
- C. Vitamins
- D. Soap
Explanation: The formula CH3(CH2)14COO-Na represents a soap compound. Soaps are salts of fatty acids and are commonly used for cleaning purposes.
Correct answer: Soap525. The formula CH3(CH2)16COO- Na+ represents a member of the class of compounds which are known as:
- A. Steroids
- B. Soaps
- C. Carbohydrates
- D. Vitamins
Explanation: The formula CH3(CH2)16COO-Na+ represents a compound known as soap.
Correct answer: Soaps- A. H2NCONH2
- B. NH4COONH4
- C. H2NCOONH2
- D. NH2COONH4
Explanation: The formula of ammonium carbamate is NH2COONH4.
Correct answer: NH2COONH4- A. high acidity
- B. high basicity
- C. neutrality
- D. high temperature
Explanation: An ester is a compound derived from an oxoacid (organic or inorganic) in which at least one hydroxyl group (−OH) is replaced by an alkoxy…
Correct answer: neutrality- A. CH3COOH and CH3OCH3
- B. CH3COOH and C2H5OH
- C. CH3COOH and CH3CHO
- D. CH3COOH and CH3COCH3
Explanation: When primary alcohol is treated with a carboxylic acid in the presence of sulphuric acid a compound is formed.
Correct answer: CH3COOH and C2H5OH- A. Esterificatoon
- B. Decarboxylation
- C. Saponification
- D. Transesterification
Explanation: Saponification is the process of hydrolyzing an ester in the presence of an alkali, typically sodium hydroxide (NaOH).
Correct answer: Saponification- A. Stabilize acid halides
- B. Consume HCl formed in the reaction
- C. Dehydrate alcohol
- D. Dehydrogenate acid halides
Explanation: This option is correct. During the reaction of acid halides with alcohols to form esters, hydrogen halide (such as HCl) is released as a…
Correct answer: Consume HCl formed in the reaction- A. Methanoic acid
- B. Chloro methane
- C. Methanoyl chloride
- D. Chloro methanoate
Explanation: The correct IUPAC name for formyl chloride is Methanoyl chloride. This name indicates that the compound is derived from methane (the…
Correct answer: Methanoyl chloride- 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- A. CH2Cl-H2-COOH
- B. CHCl2COOH
- C. CH3 COOH
- D. CH3- CH2-COOH
Explanation: Many concepts are required to be cleared while solving these types of MCQsFirst, we should know, those acids are the strongest which can…
Correct answer: CHCl2COOH- A. they are polar molecules
- B. they form H-bonds
- C. they are stronger than mineral acids
- D. they have higher boiling points than their corresponding alcohols
Explanation: Mineral acids are stronger acids than carboxylic acids because mineral acids are completely ionized, whereas carboxylic acids are…
Correct answer: they are stronger than mineral acids- A. Dichloroacetic acid
- B. Chloroacetic acid
- C. Formic acid
- D. Acetic acid
Explanation: Greater -I effect, due to the presence of two chloro groups increase the acid strength of dichloroacetic acid
Correct answer: Dichloroacetic acid- A. CH2Cl_CH2-COOH
- B. CHCl2_COOH
- C. CH3_COOH
- D. CH3-CH2-COOH
Explanation: In this case, the acidity of the carboxylic acids can be compared based on the stability of their corresponding conjugate bases.
Correct answer: CHCl2_COOH- A. Azides
- B. Esters
- C. Ketones
- D. Ethers
Explanation: When carboxylic acids react with alcohols in the presence of catalytic amounts of mineral acids, they undergo an esterification reaction.
Correct answer: Esters