Haloalkanes and Haloarenes
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Nomenclature and nature of C-X bond
SubtopicNomenclature and nature of C-X bond under Haloalkanes and Haloarenes for Grade 12 ICSE.
Preview questions (no answers)
- 1.
What is the correct IUPAC name of the haloalkane represented in the provided diagram?
A.1,2-dichlorobutane
B.2,3-dichloropropane
C.1,2-dichloropropane
D.1,1-dichloropropane
- 2.
In the IUPAC system, haloalkanes are named as derivatives of:
A.Halogens
B.Alkanes
C.Alkenes
D.Alkynes
- 3.
What is the IUPAC name of the compound ?
A.Methyl bromide
B.Bromomethane
C.Bromoethane
D.Methane bromide
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Methods of preparation
SubtopicMethods of preparation under Haloalkanes and Haloarenes for Grade 12 ICSE.
Preview questions (no answers)
- 1.
Diazotization of aniline is carried out at which temperature range?
A.100 - 110
B.273 - 278
C.373 - 378
D.500 - 600
- 2.
Which of the following reagents will convert ethanol into ethyl chloride most effectively in terms of purification?
A.gas
B.C.D. - 3.
The addition of to trans-but-2-ene results in a product that is:
A.A meso compound
B.A racemic mixture
C.Optically active
D.A primary halide
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Physical and chemical properties
SubtopicPhysical and chemical properties under Haloalkanes and Haloarenes for Grade 12 ICSE.
Preview questions (no answers)
- 1.
When methyl chloride is treated with an excess of ammonia, the major product formed is:
A.Methylamine
B.Dimethylamine
C.Trimethylamine
D.Tetramethylammonium chloride
- 2.
Which of the following reacts fastest with to form an alkyl bromide?
A.Methanol
B.Ethanol
C.Propan-2-ol
D.2-methylpropan-2-ol
- 3.
The process of separating a racemic mixture into its pure enantiomers is known as:
A.Racemization
B.Resolution
C.Inversion
D.Retention
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Mechanism of substitution reactions (SN1 and SN2)
SubtopicMechanism of substitution reactions (SN1 and SN2) under Haloalkanes and Haloarenes for Grade 12 ICSE.
Preview questions (no answers)
- 1.
In the following flowchart representing a nucleophilic substitution reaction, identify the chemical species that functions specifically as the 'substrate'.
A.B.C.D. - 2.
In a haloalkane (), the carbon-halogen bond is polarized due to the difference in electronegativity. Based on the partial charges shown in the diagram, which atom acts as the electrophilic center that is targeted by an incoming nucleophile?
A.The Carbon atom
B.The Halogen atom
C.The Hydrogen atom
D.The entire group
- 3.
In the mechanism, the rate of reaction is fastest when the leaving group is attached to a:
A.Primary carbon
B.Secondary carbon
C.Tertiary carbon
D.Methyl carbon
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Optical rotation
SubtopicOptical rotation under Haloalkanes and Haloarenes for Grade 12 ICSE.
Preview questions (no answers)
- 1.
The rotation produced by a solution is observed to be for a path length of 1 dm. If the path length is increased to 2 dm, the observed rotation will be:
A.B.C.D. - 2.
Nicol prism is made of which crystal?
A.Quartz
B.Calcite
C.Mica
D.Diamond
- 3.
Which of these molecules is chiral?
A.Propane
B.1-Bromobutane
C.2-Bromobutane
D.2-Bromopropane
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Reactions of haloarenes
SubtopicReactions of haloarenes under Haloalkanes and Haloarenes for Grade 12 ICSE.
Preview questions (no answers)
- 1.
Which of the following halogens is the most reactive in the Ullmann reaction?
A.Fluorine
B.Chlorine
C.Bromine
D.Iodine
- 2.
The Friedel-Crafts reaction of chlorobenzene with is known as:
A.Alkylation
B.Acylation
C.Sulphonation
D.Nitration
- 3.
Identify the compound formed in the Fittig reaction.
A.Diphenylmethane
B.Biphenyl
C.Naphthalene
D.Anthracene
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Polyhalogen compounds
SubtopicPolyhalogen compounds under Haloalkanes and Haloarenes for Grade 12 ICSE.
Preview questions (no answers)
- 1.
Which of the following is the formula for Chloropicrin?
A.B.C.D. - 2.
The use of as a dry cleaning agent has decreased because it causes damage to the:
A.Heart
B.Ozone layer
C.Fabric elasticity
D.Dye of the clothes
- 3.
Which polyhalogen compound can cause dizziness and nausea when its vapors are inhaled in moderate amounts?
A.Dichloromethane
B.Sodium chloride
C.Calcium carbonate
D.Magnesium sulfate
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