Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids Multiple Choice Questions (MCQs) and Answers | Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids Quiz

(1) Benzoic acid reacts with conc.HNO3 and conc.H2SO4 to give

[A] o-nitrobenzoic acid

[B] p-nitrobenzoic acid

[C] m-nitrobenzoic acid

[D] o,p-dinitrobenzoic acid

Answer: m-nitrobenzoic acid

(2) An inorganic compound producing an organic compound on heating is

[A] ammonium cyanate

[B] soda lime

[C] sodamide

[D] potassium cyanide

Answer: ammonium cyanate

(3) The reaction of ethyl formate with an excess of CH3MgI followed by hydrolysis gives

[A] ethanol

[B] n-propyl alcohol

[C] propanal

[D] isopropyl alcohol

Answer: isopropyl alcohol

(4) Formic acid and acetic acid are distinguished by reaction with

[A] sodium ethoxide

[B] sodium

[C] HgCl₂

[D] 2,4-dinitrophenylhydrazine

Answer: HgCl₂

(5) Heating a mixture of sodium benzoate and soda lime gives

[A] calcium benzoate

[B] benzene

[C] sodium benzoate

[D] methane

Answer: benzene

(6) A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives

[A] benzyl alcohol + sodium formate

[B] sodium benzoate + methanol

[C] benzyl alcohol + methanol

[D] sodium benzoate + sodium formate

Answer: benzyl alcohol + sodium formate

(7) Which of the following has the most acidic hydrogen?

[A] hexane-2,4-dione

[B] hexane-2,3-dione

[C] hexane-2,5-dione

[D] hexane-3-one

Answer: hexane-2,4-dione

(8) A new C-C bond formation is possible in

[A] cannizzaro reaction

[B] friedel crafts reaction

[C] clemmensen reduction

[D] reimer tiemann reaction

Answer: friedel crafts reaction

(9) Under Wolff-Kishner reduction conditions, the conversions which may be brought about are

[A] cyclohexanone into cyclohexane

[B] benzaldehyde into benzyl alcohol

[C] cyclohexanone into cyclohexanol

[D] benzophenone into diphenylmethane

Answer: cyclohexanone into cyclohexane

(10) The formation of cyanohydrin from a ketone is an example of

[A] electrophilic addition

[B] nucleophilic addition

[C] nucleophilic substitution

[D] electrophilic substitution

Answer: nucleophilic addition

(11) Acetone reacts with iodine (I₂) to form iodoform in the presence of

[A] CaCO₃

[B] NaOH

[C] KH

[D] MgCO₃

Answer: NaOH

(12) Which of the following compounds with molecular formula, C₅H₁₀ yields acetone on ozonolysis?

[A] 2-methyl-2-butene

[B] 3-methyl-1-butene

[C] Cyclopentane

[D] 2-methyl-1-butene

Answer: 2-methyl-2-butene

(13) Among acetic acid, phenol and n-hexanol which one of the following compound will react with NaHCO₃ solution to give sodium salt and CO₂?

[A] Acetic acid

[B] n-hexanol

[C] Acetic acid and phenol

[D] Phenol

Answer: Acetic acid

(14) The reagent used for the separation of acetaldehyde from acetophenone is

[A] NaHSO₃

[B] C₆H₅NHNH₂

[C] NH₂OH

[D] NaOH and I₂

Answer: NaHSO₃

(15) Iodoform test is not given by

[A] 2-pentanone

[B] ethanol

[C] ethanal

[D] 3-pentanone

Answer: 3-pentanone

(16) Two isomeric ketones 3-Pentanones and 2-pentanone can be distinguished by

[A] I₂/NaOH only

[B] NaHSO₃ only

[C] NaCN/HCl

[D] both of (a) and (b)

Answer: both of (a) and (b)

(17) Products of the following reaction

[A] CH₃CHO + CH₃CH₂CHO

[B] CH₃COOH + CH₃COCH₃

[C] CH₃COOH + HOOC.CH₂CH₃

[D] CH₃COOH + CO₂

Answer: CH₃COOH + HOOC.CH₂CH₃

(18) Which alkene on ozonolysis gives CH₃CH₂CHO and CH₃COCH₃

[A]

[B] CH₃CH₂CH=CHCH₂CH₃

[C] CH₃CH₂CH=CHCH₃

[D]

Answer:

(19) The major organic product formed from the following reaction

[A]

[B]

[C]

[D]

Answer:

(20) Benzoic acid gives benzene on being heated with X and phenol gives benzene on being heated with Y. Therefore, X and Y are respectively

[A] Sodalime and copper

[B] Zn dust and NaOH

[C] Cu and sodalime

[D] Sodalime and zinc dust

Answer: Sodalime and zinc dust

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Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids MCQs | Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids Multiple Choice Questions (MCQs) and Answers

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