Organic Compounds Containing Nitrogen
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Amines: Classification and nomenclature
SubtopicAmines: Classification and nomenclature under Organic Compounds Containing Nitrogen for Grade 12 ICSE.
Preview questions (no answers)
- 1.
In a primary amine, how many hydrogen atoms of the ammonia () molecule are replaced by alkyl or aryl groups?
A.Zero
B.One
C.Two
D.Three
- 2.
How is Diethylamine classified?
A.Simple secondary amine
B.Mixed secondary amine
C.Simple tertiary amine
D.Mixed tertiary amine
- 3.
What is the IUPAC name for p-Toluidine?
A.2-methylbenzenamine
B.3-methylbenzenamine
C.4-methylbenzenamine
D.Phenylmethanamine
- 4.
The IUPAC name of is:
A.N,N-dimethylmethanamine
B.N,N-dimethylethanamine
C.N-methylethanamine
D.Trimethylethanamine
- 5.
What is the IUPAC name for the compound 4-amino-2-pentanone?
A.4-aminopentan-2-one
B.2-aminopentan-4-one
C.1-methyl-3-aminobutan-1-one
D.4-amino-2-oxopentane
- 6.
What is the correct IUPAC name for ?
A.-dimethylethanamine
B.-diethylmethanamine
C.-ethyl--methylmethanamine
D.Ethyldimethylamine
- 7.
The compound Neopentylamine (2,2-dimethylpropan-1-amine) is classified as a:
A.Primary amine
B.Secondary amine
C.Tertiary amine
D.Quaternary amine
- 8.
Determine the IUPAC name for with an additional ethyl group on the nitrogen.
A.N-ethylhexan-3-amine
B.3-(ethylamino)hexane
C.N-ethyl-1-propylpropan-1-amine
D.N-ethyl-3-aminohexane
- 9.
What is the IUPAC name for -diethyl-p-nitroaniline?
A.N,N-diethyl-4-nitrobenzenamine
B.1-diethylamino-4-nitrobenzene
C.4-nitro-N,N-diethylaniline
D.p-nitrophenyldiethylamine
- 10.
The systematic name for the compound is:
A.2-methylpropane-1,3-diamine
B.1,3-diamino-2-methylpropane
C.2-methyl-1,3-propanediamine
D.Butane-1,3-diamine
Download the worksheet for Organic Compounds Containing Nitrogen - Amines: Classification and nomenclature to practice offline. It includes additional chapter-level practice questions.
Methods of preparation and properties
SubtopicMethods of preparation and properties under Organic Compounds Containing Nitrogen for Grade 12 ICSE.
Preview questions (no answers)
- 1.
Which compound is obtained when Ethylamine is treated with ?
A.B.C.D. - 2.
What is the product of the reaction between Benzene Diazonium Chloride and Fluoroboric acid () followed by heating?
A.Chlorobenzene
B.Fluorobenzene
C.Benzene
D.Nitrobenzene
- 3.
The electrophile involved in the diazotization of aniline is:
A.B.C.D. - 4.
Aniline is less basic than ethylamine because:
A.Lone pair on N is involved in resonance in aniline
B.Lone pair on N is more available in aniline
C.Ethyl group has a -I effect
D.Benzene ring has a +I effect
- 5.
The primary amine reacts with (Phosgene) to form:
A.Alkyl isocyanate
B.Alkyl carbamate
C.Alkyl urea
D.Alkyl cyanide
- 6.
Which of the following compounds will not give the Azo-dye test?
A.Aniline
B.p-toluidine
C.Ethylamine
D.-naphthylamine
- 7.
Alkyl cyanides are prepared by heating alkyl halides with:
A.in aqueous ethanol
B.in aqueous ethanol
C.in acidic medium
D.in alcoholic medium
- 8.
Which of the following compounds will give a positive carbylamine test?
A.N-methylaniline
B.2,4-dimethylaniline
C.N,N-dimethylaniline
D.p-nitrodiphenylamine
- 9.
Which of the following is the most effective method to convert an alkyl halide to a primary amine with one additional carbon atom?
A.Reaction with followed by
B.Reaction with followed by reduction
C.Gabriel Phthalimide synthesis
D.Hoffmann Bromamide degradation
- 10.
The reaction of Benzenediazonium chloride with to form chlorobenzene is known as:
A.Gattermann reaction
B.Sandmeyer reaction
C.Wurtz-Fittig reaction
D.Ullmann reaction
Download the worksheet for Organic Compounds Containing Nitrogen - Methods of preparation and properties to practice offline. It includes additional chapter-level practice questions.
Basicity of amines
SubtopicBasicity of amines under Organic Compounds Containing Nitrogen for Grade 12 ICSE.
Preview questions (no answers)
- 1.
The presence of a group on the benzene ring of aniline:
A.Increases basicity due to effect
B.Decreases basicity due to effect
C.Increases basicity due to resonance
D.Makes it a stronger base than methylamine
- 2.
As we move from to to , the basic strength in aqueous solution:
A.Increases
B.Decreases
C.Remains the same
D.First decreases then increases
- 3.
Which amine would form the most stable hydrogen bonds with water when protonated?
A.B.C.D. - 4.
Basicity of amines in aqueous solution is a combined effect of:
A.Inductive effect and resonance only
B.Solvation and steric effects only
C.Inductive, solvation, and steric effects
D.Electronegativity and molecular weight
- 5.
Which of the following amines is the strongest base in an aqueous solution?
A.Methylamine
B.Dimethylamine
C.Trimethylamine
D.Ammonia
- 6.
The conjugate acid of which of the following amines is the most stable in water?
A.B.C.D. - 7.
The basic strength of , , and in the gas phase follows the order: . This is due to:
A.Solvation effect
B.Inductive effect
C.Steric effect
D.Electromeric effect
- 8.
Comparing the of the conjugate acids, which of the following is the correct order of basicity for substituted pyridines?
A.4-Aminopyridine > 3-Aminopyridine > 2-Aminopyridine
B.2-Aminopyridine > 3-Aminopyridine > 4-Aminopyridine
C.3-Aminopyridine > 4-Aminopyridine > 2-Aminopyridine
D.4-Aminopyridine > 2-Aminopyridine > 3-Aminopyridine
- 9.
Which of the following amines can be protonated but cannot be alkylated easily with bulky alkyl halides due to steric effects?
A.-Tetramethylpiperidine
B.Piperidine
C.Triethylamine
D.Methylamine
- 10.
Which of the following will have the lowest basicity?
A.Phthalimide
B.Aniline
C.Ethylamine
D.Ammonia
Download the worksheet for Organic Compounds Containing Nitrogen - Basicity of amines to practice offline. It includes additional chapter-level practice questions.
Identification of primary, secondary and tertiary amines
SubtopicIdentification of primary, secondary and tertiary amines under Organic Compounds Containing Nitrogen for Grade 12 ICSE.
Preview questions (no answers)
- 1.
The group present in secondary amines is called the:
A.Amino group
B.Imino group
C.Nitro group
D.Cyano group
- 2.
Which of the following is more basic than ammonia in the aqueous phase?
A.Aniline
B.Nitrobenzene
C.Methylamine
D.Acetamide
- 3.
Which amine classification is represented by the formula ?
A.Primary
B.Tertiary
C.Quaternary
D.Secondary
- 4.
What is the name of the simplest primary aromatic amine?
A.Aniline
B.Benzylamine
C.Benzamide
D.Phenol
- 5.
An organic compound 'P' reacts with benzene sulphonyl chloride to give a compound 'Q' which is insoluble in alkali. 'P' is most likely:
A.Ethylamine
B.Diethylamine
C.Triethylamine
D.Aniline
- 6.
Which reagent is used in the Hinsberg test to separate a mixture of primary, secondary, and tertiary amines?
A.and
B.and
C.and
D.and
- 7.
Identify the amine which reacts with nitrous acid to form a yellow oily liquid that does not evolve gas.
A.Trimethylamine
B.Aniline
C.Diethylamine
D.Isopropylamine
- 8.
An unknown compound gives a positive carbylamine test. On treatment with and at , followed by boiling with water, it gives a compound . gives a violet color with neutral . is:
A.Benzylamine
B.Aniline
C.Phenol
D.Ethylamine
- 9.
Identify the correct order of boiling points for the following isomeric amines: (I) -butylamine, (II) diethylamine, (III) -dimethylethylamine.
A.I > II > III
B.III > II > I
C.II > I > III
D.I > III > II
- 10.
A mixture of methylamine, dimethylamine, and trimethylamine is separated using the Hinsberg reagent. After the reaction, the mixture is distilled. Which amine is recovered from the distillate after treating it with acid?
A.Methylamine
B.Dimethylamine
C.Trimethylamine
D.None, all form non-volatile salts
Download the worksheet for Organic Compounds Containing Nitrogen - Identification of primary, secondary and tertiary amines to practice offline. It includes additional chapter-level practice questions.
Diazonium salts: Preparation and chemical reactions
SubtopicDiazonium salts: Preparation and chemical reactions under Organic Compounds Containing Nitrogen for Grade 12 ICSE.
Preview questions (no answers)
- 1.
Which aromatic diazonium salt is more likely to be stable at room temperature?
A.Benzenediazonium chloride
B.Benzenediazonium fluoroborate
C.Benzenediazonium bromide
D.Benzenediazonium iodide
- 2.
What is the primary role of ice in the preparation of diazonium salts?
A.To speed up the reaction
B.To prevent the decomposition of the diazonium salt
C.To act as a catalyst
D.To dissolve the aniline
- 3.
In the context of diazonium salts, what does the term 'coupling' refer to?
A.Breaking of the bond
B.Reaction with aromatic compounds to form azo dyes
C.Reaction with metals to form alloys
D.Formation of aniline from nitrobenzene
- 4.
Which of the following is produced when benzenediazonium chloride is treated with boiling water?
A.Aniline
B.Phenol
C.Benzene
D.Chlorobenzene
- 5.
Which of the following statements about the stability of benzene diazonium chloride is FALSE?
A.It is stable in cold aqueous solution.
B.It is stable as a dry solid at room temperature.
C.It decomposes when heated with water.
D.Its stability is due to the dispersal of the positive charge over the benzene ring.
- 6.
Benzene diazonium chloride is often used in the synthesis of aryl cyanides. Why is this reaction particularly useful in organic synthesis?
A.Aryl cyanides are very colorful dyes.
B.The group can be hydrolyzed to a group.
C.The group makes the benzene ring more reactive to electrophiles.
D.It is the only way to introduce nitrogen into a benzene ring.
- 7.
What is the product formed when benzene diazonium chloride is treated with -phenylenediamine?
A.Aniline yellow
B.Chrysoidine
C.Methyl orange
D.Bismarck brown
- 8.
Which of the following is the electrophile in the diazotization reaction using and ?
A.B.C.D. - 9.
Why is the diazotization of aniline carried out at very low temperatures ()?
A.To prevent the oxidation of aniline.
B.To prevent the decomposition of the diazonium salt into phenol and .
C.To prevent the formation of nitrobenzene.
D.To increase the solubility of the nitrous acid.
- 10.
Aryl diazonium salts react with certain active methylene compounds (like ethyl acetoacetate) to give phenylhydrazones. This reaction is known as:
A.Gomberg reaction
B.Japp-Klingemann reaction
C.Schiemann reaction
D.Sandmeyer reaction
Download the worksheet for Organic Compounds Containing Nitrogen - Diazonium salts: Preparation and chemical reactions to practice offline. It includes additional chapter-level practice questions.
Cyanides and Isocyanides
SubtopicCyanides and Isocyanides under Organic Compounds Containing Nitrogen for Grade 12 ICSE.
Preview questions (no answers)
- 1.
Acidic hydrolysis of results in the formation of:
A.Ethanoic acid
B.Propanoic acid
C.Butanoic acid
D.Formic acid
- 2.
What is the molecular formula of methyl carbylamine?
A.B.C.D. - 3.
Alkyl cyanides on reduction with produce:
A.Secondary amines
B.Primary amines
C.Tertiary amines
D.Amides
- 4.
What is the shape of the molecule ?
A.Bent
B.Trigonal planar
C.Linear (at the group)
D.Tetrahedral
- 5.
When methyl cyanide is treated with magnesium and then hydrolyzed, it does not typically yield a ketone because:
A.It is a gas
B.It reacts with magnesium to form a salt
C.The intermediate imine is unstable
D.It lacks an alpha hydrogen
- 6.
Reduction of using in the presence of and is a part of:
A.Mendius reduction
B.Stephen's reduction
C.Rosenmund reduction
D.Clemmensen reduction
- 7.
Hydrogen cyanide () and hydrogen isocyanide () are:
A.Chain isomers
B.Tautomers
C.Metamers
D.Geometrical isomers
- 8.
Identify 'Y' in the reaction: . If is reduced with , it gives .
A.Secondary amine with a methyl group
B.Primary amine with one extra carbon
C.Tertiary amine
D.Quaternary ammonium salt
- 9.
When methyl isocyanide is treated with mercuric oxide (), the gas evolved is:
A.B.C.D.No gas is evolved; a liquid is formed
- 10.
The structure of the isocyanide group is best represented as a resonance hybrid of which forms?
A.and
B.and
C.and
D.and
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