Aldehydes, Ketones and Carboxylic Acids
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Nomenclature and Structure of Carbonyl Group
SubtopicNomenclature and Structure of Carbonyl Group under Aldehydes, Ketones and Carboxylic Acids for Grade 12 CBSE.
Preview questions (no answers)
- 1.
What is the IUPAC name of the following compound: ?
A.Ethanedioic acid
B.Propanedioic acid
C.Butanedioic acid
D.Malonic acid
- 2.
How many and bonds are present in the part of the carbonyl group?
A.Two bonds
B.Two bonds
C.One and one bond
D.Three bonds
- 3.
What is the IUPAC name of the compound ?
A.Butanal
B.Pentanal
C.Hexanal
D.Pentan-2-one
- 4.
Which of the following is the prefix for the group when another group has higher priority?
A.Formyl-
B.Oxo-
C.Carboxy-
D.Carbaldehyde-
- 5.
The common name for is:
A.Ethanal
B.Propanal
C.Propionaldehyde
D.Butyraldehyde
- 6.
What is the IUPAC name for the unsaturated carboxylic acid ?
A.Propenoic acid
B.Prop-2-enoic acid
C.Acrylic acid
D.Both Propenoic acid and Prop-2-enoic acid are acceptable
- 7.
In the nomenclature of ketones, the parent chain is numbered such that the carbonyl carbon gets:
A.The highest possible number
B.The lowest possible number
C.Number 1 always
D.Number 2 always
- 8.
What is the IUPAC name for ?
A.But-2-ynal
B.But-3-ynal
C.Prop-2-ynal
D.But-2-yn-1-al
- 9.
When naming aromatic ketones like Benzophenone, the IUPAC name is based on the 'one' suffix. Benzophenone is:
A.Diphenylmethanone
B.Dibenzyl ketone
C.Diphenyl ketone
D.Phenylbenzaldehyde
- 10.
The IUPAC name of -methylbutyraldehyde is:
A.2-Methylbutanal
B.3-Methylbutanal
C.2-Methylbutyraldehyde
D.Pentanal
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Preparation of Aldehydes and Ketones
SubtopicPreparation of Aldehydes and Ketones under Aldehydes, Ketones and Carboxylic Acids for Grade 12 CBSE.
Preview questions (no answers)
- 1.
Which of the following reagents will convert an acyl chloride into a ketone?
A.Grignard reagent followed by hydrolysis
B.Dialkylcadmium
C.DIBAL-H
D. - 2.
What is the product when but-1-yne is treated with and ?
A.Butanal
B.Butan-2-one
C.Butan-1-ol
D.Butanoic acid
- 3.
The reduction of a nitrile to an imine is the first step of which named reaction?
A.Etard reaction
B.Rosenmund reaction
C.Stephen reaction
D.Gatterman-Koch reaction
- 4.
Acetophenone can be prepared by the reaction of benzene with which of the following in the presence of anhydrous ?
A.B.C.D. - 5.
An organic compound is synthesized from -bromopropane through the reaction sequence shown in the diagram. In Step 1, -bromopropane reacts with in dry ether to form a Grignard reagent . In Step 2, reacts with ethanenitrile () to form an intermediate , which is then hydrolyzed in Step 3 to yield the final ketone . Identify the IUPAC name of .
A.Pentan-2-one
B.3-Methylbutan-2-one
C.2,2-Dimethylpropanal
D.Pentan-3-one
- 6.
Ozonolysis of -dimethylbut-2-ene yields:
A.Two moles of ethanal
B.Two moles of propanone
C.One mole of ethanal and one mole of propanal
D.Two moles of methanal
- 7.
In the catalytic dehydrogenation of primary alcohols to aldehydes, which metal is used as a catalyst at ?
A.Zinc
B.Copper
C.Iron
D.Magnesium
- 8.
When vapors of 2-methylpropan-2-ol are passed over heated copper at , the product obtained is:
A.2-Methylpropanal
B.2-Methylpropanone
C.2-Methylpropene
D.Butan-2-one
- 9.
Why is formyl chloride not a standard reagent for Friedel-Crafts formylation to produce benzaldehyde?
A.It is too bulky for the benzene ring.
B.It is a liquid that is hard to handle.
C.It is unstable and decomposes into and at room temperature.
D.It reacts with to form a stable, inactive salt.
- 10.
What is the result of treating -nitrotoluene with in followed by hydrolysis?
A.-Nitrobenzoic acid
B.-Nitrobenzyl alcohol
C.-Nitrobenzaldehyde
D.-Nitrobenzaldehyde
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Physical and Chemical Properties
SubtopicPhysical and Chemical Properties under Aldehydes, Ketones and Carboxylic Acids for Grade 12 CBSE.
Preview questions (no answers)
- 1.
Dry distillation of calcium acetate gives:
A.Formaldehyde
B.Acetaldehyde
C.Acetone
D.Acetic acid
- 2.
Gatterman-Koch reaction is used to synthesize:
A.Ethanal
B.Benzaldehyde
C.Acetophenone
D.Acetone
- 3.
A ketone reacts with semicarbazide to form a:
A.Hydrazone
B.Semicarbazone
C.Oxime
D.Acetal
- 4.
Which of the following has the lowest value?
A.B.C.D. - 5.
The acidity of carboxylic acids can be explained by the stability of the carboxylate ion due to:
A.Inductive effect only
B.Resonance effect
C.Hyperconjugation
D.Electromeric effect
- 6.
Which of the following will give a positive test with Fehling's solution?
A.Benzaldehyde
B.Acetone
C.Propanal
D.Acetophenone
- 7.
In the oxidation of unsymmetrical ketones by strong oxidizing agents, the cleavage of the bond occurs such that the carbonyl group stays with the smaller alkyl group. This is known as:
A.Saytzeff rule
B.Popoff's rule
C.Markovnikov's rule
D.Hund's rule
- 8.
A multi-step synthesis is performed starting with 4-oxopentanoic acid. The compound is first treated with ethylene glycol in the presence of dry gas to form Compound A. Compound A is then reacted with in anhydrous ether, and the resulting mixture is finally treated with dilute to yield the organic product Z. What is the IUPAC name of product Z?
A.5-hydroxypentan-2-one
B.Pentane-1,4-diol
C.4-hydroxypentanoic acid
D.2-methyl-1,3-dioxolane-2-propanoic acid
- 9.
The Wolff-Kishner reduction is not suitable for which of the following compounds?
A.Benzaldehyde
B.Acetone
C.p-Nitroacetophenone
D.2-Hydroxybenzaldehyde
- 10.
When Acetic acid is reacted with Chlorine in the presence of Red Phosphorus, and the product is further treated with excess of Ammonia, the final organic product is:
A.Acetamide
B.Glycine (Aminoacetic acid)
C.Ethylamine
D.Nitroacetic acid
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Nucleophilic Addition Reactions
SubtopicNucleophilic Addition Reactions under Aldehydes, Ketones and Carboxylic Acids for Grade 12 CBSE.
Preview questions (no answers)
- 1.
In the reaction of propanone with methyl magnesium bromide, the carbon of the Grignard reagent attacks:
A.The methyl group of propanone
B.The oxygen atom of propanone
C.The carbonyl carbon of propanone
D.The magnesium atom
- 2.
Which group increases the reactivity of a carbonyl group towards nucleophilic addition when attached to the carbonyl carbon?
A.Electron donating group
B.Electron withdrawing group
C.Large alkyl group
D.Bulky aryl group
- 3.
The reaction between a carbonyl compound and 2,4-DNP involves the elimination of:
A.Oxygen gas
B.Water
C.Nitrogen gas
D.Hydrogen gas
- 4.
When an aldehyde is treated with excess alcohol and dry , the final product is:
A.Hemiacetal
B.Acetal
C.Ketal
D.Ether
- 5.
When an aldehyde reacts with hydrazine and then with and ethylene glycol (Wolff-Kishner reduction), the carbonyl group is converted to:
A.B.C.D. - 6.
The addition of Grignard reagent to a carbonyl group is followed by hydrolysis. The source of the 'H' atom that attaches to the oxygen in the resulting alcohol is:
A.The Grignard reagent
B.The carbonyl compound
C.Water added during hydrolysis
D.The ether solvent
- 7.
What is the correct order of nucleophilicity for the following species in the reaction with a carbonyl group?
A.B.C.D. - 8.
Which of the following gives an addition product with that is a complex cyclic compound called urotropine?
A.Acetaldehyde
B.Acetone
C.Formaldehyde
D.Benzaldehyde
- 9.
In the reaction of a ketone with a primary amine, the intermediate carbinolamine loses water to form an imine. Which factor most influences the ease of this dehydration step?
A.The concentration of the nucleophile.
B.The acidity of the medium (presence of ).
C.The temperature of the reaction.
D.The steric bulk of the ketone alkyl groups.
- 10.
Which of the following will have the highest percentage of hydrate at equilibrium in water?
A.B.C.D.
Download the worksheet for Aldehydes, Ketones and Carboxylic Acids - Nucleophilic Addition Reactions to practice offline. It includes additional chapter-level practice questions.
Acidity of Carboxylic Acids
SubtopicAcidity of Carboxylic Acids under Aldehydes, Ketones and Carboxylic Acids for Grade 12 CBSE.
Preview questions (no answers)
- 1.
Carboxylic acids are known to be more acidic than many other organic compounds because they can easily donate a proton to form a resonance-stabilized anion. Based on the dissociation flowchart provided, what is the general chemical name for the anion represented as 'Species B'?
A.Alkoxide ion
B.Carboxylate ion
C.Phenoxide ion
D.Hydroxide ion
- 2.
Among the following, which one does NOT react with sodium bicarbonate to give carbon dioxide?
A.Benzoic acid
B.Acetic acid
C.Phenol
D.Formic acid
- 3.
Which of the following groups, if substituted in benzoic acid, will increase its value?
A.B.C.D. - 4.
The inductive effect of a halogen atom on the acidity of a carboxylic acid is known as:
A.effect
B.effect
C.effect
D.effect
- 5.
Which of the following correctly identifies the role of the phenyl group in benzoic acid compared to the methyl group in acetic acid?
A.The hybridized phenyl group is more electron-withdrawing than the methyl group, increasing acidity
B.The phenyl group is more electron-donating due to resonance
C.The phenyl group makes the acid weaker by destabilizing the ion
D.There is no difference in their electronic effects
- 6.
In a comparison between ethanoic acid and propanoic acid, which statement is true?
A.Ethanoic acid is stronger because the methyl group has a smaller effect than the ethyl group
B.Propanoic acid is stronger because it has more carbon atoms
C.Ethanoic acid is weaker because it lacks an ethyl group
D.The of propanoic acid is lower than that of ethanoic acid
- 7.
How does the of -chlorobenzoic acid compare to -chlorobenzoic acid?
A.-Chlorobenzoic acid is more acidic because the effect of is stronger at the meta position than the para position
B.-Chlorobenzoic acid is more acidic because of the effect
C.They have the same because the distance is the same
D.Benzoic acid is stronger than both
- 8.
Consider the acid strength of the following four carboxylic acids: (I) (II) (III) (IV)
Which of the following represents the correct decreasing order of their acid strength?
A.III > I > IV > II
B.IV > III > I > II
C.III > IV > I > II
D.III > IV > II > I
- 9.
Consider the acidities of the following three acids: (X) , (Y) , (Z) . The correct order of their values for solutions is:
A.X > Y > Z
B.Z > Y > X
C.Y > X > Z
D.X > Z > Y
- 10.
Which of the following explains why p-nitrophenol has a of 7.15, whereas p-nitrobenzoic acid has a of 3.44?
A.Phenoxide is more stable than carboxylate.
B.The carboxylate group has two equivalent resonance structures where the negative charge is on oxygen, providing much greater stability than phenoxide resonance.
C.The nitro group has a stronger effect in phenols than in benzoic acids.
D.Benzoic acid is smaller than phenol, leading to less steric hindrance.
Download the worksheet for Aldehydes, Ketones and Carboxylic Acids - Acidity of Carboxylic Acids to practice offline. It includes additional chapter-level practice questions.
Preparation of Carboxylic Acids
SubtopicPreparation of Carboxylic Acids under Aldehydes, Ketones and Carboxylic Acids for Grade 12 CBSE.
Preview questions (no answers)
- 1.
When Propyl benzene is treated with alkaline and then acidified, the product is:
A.Benzoic acid
B.Propanoic acid
C.Phenylacetic acid
D.3-Phenylpropanoic acid
- 2.
Identify the reagent required for the step :
A.B.C.D. - 3.
Which of the following will not yield a carboxylic acid on simple hydrolysis?
A.Acid chloride
B.Acid anhydride
C.Ester
D.Alkane
- 4.
The conversion of involves how many steps of hydrolysis?
A.One step
B.Two steps (via amide)
C.Three steps
D.No steps
- 5.
Oxidation of 1-phenylethanol with acidic gives:
A.Benzoic acid
B.Phenylacetic acid
C.Acetophenone
D.Benzaldehyde
- 6.
Which of the following cannot be used to oxidize an aldehyde to a carboxylic acid?
A.Tollen's reagent
B.Fehling's solution
C.Bromine water
D. - 7.
Preparation of carboxylic acids from Grignard reagents and nitriles are methods used to:
A.Decrease the carbon chain length
B.Increase the carbon chain length
C.Keep the carbon chain length same
D.Introduce a halogen atom
- 8.
In the sequence , the product 'Y' is:
A.Propanoic acid
B.Ethanoic acid
C.Ethylamine
D.Propylammonium salt (via Isocyanide hydrolysis)
- 9.
Reaction of an alkene with hot alkaline followed by acidification yields carboxylic acids. If the alkene is 2-methylbut-2-ene, the products are:
A.Ethanoic acid and Propanone
B.Ethanoic acid and Propanoic acid
C.Methanoic acid and Butanone
D.Two moles of Ethanoic acid
- 10.
Which statement is true regarding the oxidation of alcohols with ?
A.It requires acidic conditions only
B.It requires basic conditions followed by acidification
C.It always stops at the aldehyde stage
D.It is an example of nucleophilic substitution
Download the worksheet for Aldehydes, Ketones and Carboxylic Acids - Preparation of Carboxylic Acids to practice offline. It includes additional chapter-level practice questions.
Uses of Aldehydes, Ketones and Carboxylic Acids
SubtopicUses of Aldehydes, Ketones and Carboxylic Acids under Aldehydes, Ketones and Carboxylic Acids for Grade 12 CBSE.
Preview questions (no answers)
- 1.
Acetone is a starting material for the synthesis of which of the following plastics?
A.Bakelite
B.Plexiglass
C.Nylon
D.Terylene
- 2.
Which of the following is a use of Benzoic acid in medicine?
A.Urinary antiseptic
B.Painkiller
C.Antibiotic
D.Anesthetic
- 3.
Ethanoic acid is used in the preparation of which common food item?
A.Jam
B.Pickles
C.Butter
D.Cheese
- 4.
Which ketone is used in the preparation of Iodoform?
A.Benzophenone
B.Acetophenone
C.Acetone
D.3-Pentanone
- 5.
Acetaldehyde () is a versatile starting material in industrial chemistry. Which of the following compounds, synthesized from acetaldehyde, is widely used as a monomer in the production of polymers found in common adhesives and latex-based paints?
A.Ethyl acetate
B.Vinyl acetate
C.Paraldehyde
D.Crotonaldehyde
- 6.
Which chemical is used to produce urea-formaldehyde resins for plywood adhesives?
A.Acetaldehyde
B.Formaldehyde
C.Propionaldehyde
D.Acetone
- 7.
Identify the acid used in the production of dyes like indigo.
A.Acetic acid
B.Formic acid
C.Aniline
D.Phenylacetic acid
- 8.
Sodium formate, the salt of formic acid, is used in the textile industry. What is its function in the dyeing process?
A.As a buffering agent and reducing agent
B.As a surfactant to improve wetting
C.As a mordant for acidic dyes
D.As a bleaching agent for dark fabrics
- 9.
Acetone is used as a precursor for the synthesis of 'Bisphenol A' (BPA). What is the primary application of BPA?
A.Production of Polycarbonates and Epoxy resins
B.Synthesis of Polypropylene
C.Manufacture of Synthetic wool (Orlon)
D.Production of Silicones
- 10.
Sebacic acid is a dicarboxylic acid used in the production of which specific polymer?
A.Nylon 6,10
B.Nylon 6
C.Nylon 6,6
D.Kevlar
Download the worksheet for Aldehydes, Ketones and Carboxylic Acids - Uses of Aldehydes, Ketones and Carboxylic Acids to practice offline. It includes additional chapter-level practice questions.