Chemistry Chapter 9 – Aromatic Hydrocarbons (Class 12) for FSC, Entry Tests & NTS Preparation
Chapter 9, Aromatic Hydrocarbons, is an important topic for Class 12 students preparing for FSC board exams and medical/engineering entry tests like MDCAT, NUMS, AKU, NUST, ECAT, and NTS exams. This chapter explains the structure, nomenclature, properties, and reactions of aromatic compounds, including benzene and its derivatives. Understanding aromatic hydrocarbons is essential for studying resonance, electrophilic substitution reactions, and their applications in industry and daily life.
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Boiling point of benzene is:
The bond angles in benzene ring are:
PMC Sample 1
Chemistry
Hydrocarbons
Elimination Tool:
Friedel-Crafts Reaction can be used for the preparation of :
The ratio of σ to π bonds in benzene is:
NUMS 2019 Reconduct
Chemistry
Hydrocarbons
Elimination Tool:
Methane gas is also known as
PMC Sample 2
Chemistry
Hydrocarbons
Elimination Tool:
Which one of the following is the correct structure of 2,2-Dimethylbutane?
PMC Sample 1
Chemistry
Hydrocarbons
Elimination Tool:
Name the main product formed as a result of the following reaction
H3C – (CH2)5 – CH3 ————> Product
n-heptane
Conditions: 480 – 550 C, 150 – 399 psi V2O5
NTS 2019
Chemistry
Hydrocarbons
Elimination Tool:
How many chain isomers are possible for the alkane C6H14?
NTS 2016 SMBBMC
Chemistry
Hydrocarbons
Elimination Tool:
n-Heptane can be converted into benzene by catalysts:
What is the color of silver acetylide, AgC=CAg?
PMC Practice 2
Chemistry
Hydrocarbons
Elimination Tool:
All of the following react with KMnO4 except
NUMS 2017
Chemistry
Hydrocarbons
Elimination Tool:
Acetylene upon heating at 300 C gives:
Activation of the benzene ring in aniline can be decreased by treating with:
NUMS 2017
Chemistry
Hydrocarbons
Elimination Tool:
Free radical reactions take place in the presence of ______?
PMC Practice 1
Chemistry
Hydrocarbons
Elimination Tool:
Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent?
NUMS 2014
Chemistry
Hydrocarbons
Elimination Tool:
Which of the following gases is used for welding purpose:
NTS 2019
Chemistry
Hydrocarbons
Elimination Tool:
The carbon number of gasoline is:
NTS 2019
Chemistry
Hydrocarbons
Elimination Tool:
Stability of benzene is due to
Who rejected vital force theory
PMC Sample 3
Chemistry
Hydrocarbons
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Which of the following is NOT explained by Kekule structure of benzene?
PMC Sample 2
Chemistry
Hydrocarbons
Elimination Tool:
In composition of natural gas, 0.17% is constituted by:
NUMS 2018
Chemistry
Hydrocarbons
Elimination Tool:
Friedel craft’s reaction gives?
Acetylene polymerizes to make:
PMC Sample 3
Chemistry
Hydrocarbons
Elimination Tool:
In which of the following cases are the benzene rings isolated?
NUMS 2015
Chemistry
Hydrocarbons
Elimination Tool:
If both double and triple bonds are present in the chain, double bond is given the ______
PMC Sample 2
Chemistry
Hydrocarbons
Elimination Tool:
Alkenes undergo:
UHS 2019
Chemistry
Hydrocarbons
Elimination Tool:
How many Dewar Structure of Benzene are present?
PolymerizatIon of ______ produces synthetic rubber.
PMC Sample 1
Chemistry
Hydrocarbons
Elimination Tool:
Acetylene on reacting with ammonium silver nitrate gives.
NUMS 2014
Chemistry
Hydrocarbons
Elimination Tool:
C6H5 Is:
Name the main product formed as a result of the following reaction
H3C – (CH2)5 – CH3 ————> Product
n-heptane
Conditions: 480 – 550 C, 150 – 399 psi V2O5
NTS 2019
Chemistry
Hydrocarbons
Elimination Tool:
Alkaline KMnO4 converts ethylene into:
NUMS 2014
Chemistry
Hydrocarbons
Elimination Tool:
The position of the double bond in alkenes can be identified by:
PMC Sample 3
Chemistry
Hydrocarbons
Elimination Tool:
How many chain isomers of Pentane is possible?
PMC Practice 1
Chemistry
Hydrocarbons
Elimination Tool:
Benzene is prepared in laboratory by distillation of phenol with
Catalytic hydrogenation of alkenes exhibits:
NUMS 2019 Cancelled
Chemistry
Hydrocarbons
Elimination Tool:
The C-H bond distance is the longest in:
NUMS 2015
Chemistry
Hydrocarbons
Elimination Tool:
Which of the following statements is incorrect about benzene?
The unhybridized p orbitals of benzene are present in the form of _________.
PMC Practice 2
Chemistry
Hydrocarbons
Elimination Tool:
Which one of the following organic compounds have the least carbon-carbon bond length?
NUMS 2017
Chemistry
Hydrocarbons
Elimination Tool:
Hydrocarbons which burn with a smoky flame are called:
NUMS 2015
Chemistry
Hydrocarbons
Elimination Tool:
Which derivative of benzene shows maximum reactivity in electrophilic substitution reactions?
UHS 2019
Chemistry
Hydrocarbons
Elimination Tool:
Which of the following compounds react slower than benzene in electrophilic substitution reaction?
NUMS 2019 Reconduct
Chemistry
Hydrocarbons
Elimination Tool:
Gasoline is a mixture of?
NUMS 2018
Chemistry
Hydrocarbons
Elimination Tool:
The structure of cyclohexane is:
PMC Sample 3
Chemistry
Hydrocarbons
Elimination Tool:
Alkenes are:
PMC Sample 3
Chemistry
Hydrocarbons
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What happens when one mole of ethane is mixed in the dark at room temperature with six moles of chlorine?
NTS 2017
Chemistry
Hydrocarbons
Elimination Tool:
Fuels with higher octane number can be produced by ___________.
PMC Practice 2
Chemistry
Hydrocarbons
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Benzene with nitrating mixture gives?
The reaction of benzene with bromine gives?
Organic compounds in which tetravalency of carbon atom is satisfied are called as ____ ?
PMC Practice 1
Chemistry
Hydrocarbons
Elimination Tool:
The four bonds of carbon in methane are directed towards the corners of a:
NUMS 2014
Chemistry
Hydrocarbons
Elimination Tool:
Which type of bonds are broken during cracking?
PMC Practice 1
Chemistry
Hydrocarbons
Elimination Tool:
Which catalyst is used to oxidize benzene rings?
NUMS 2019 Reconduct
Chemistry
Hydrocarbons
Elimination Tool:
Reduction of benzene is presence of Ni gives:
NUMS 2019 Cancelled
Chemistry
Hydrocarbons
Elimination Tool:
Which of the following Is formula of Benzyl Alcohol?
Physical properties of Ethyne is/are:
NTS 2015 DUHS and JSMU
Chemistry
Hydrocarbons
Elimination Tool:
Benzene when reacted with chlorine in ultraviolet rays produces:
Which type of hybridization takes place in benzene?
Which one of the following is not a heterocyclic compound?
PMC Sample 3
Chemistry
Hydrocarbons
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What are the products of destructive distillation of coal?
PMC Practice 1
Chemistry
Hydrocarbons
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Which of the following method is used to prepare Ethylene glycol from ethene?
PMC Practice 1
Chemistry
Hydrocarbons
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The hybridization of benzene is:
Key Concepts about Aromatic Hydrocarbons
The chapter explains the concept of aromaticity, Huckel’s rule, and the stability of benzene and other aromatic compounds. It covers the IUPAC nomenclature, physical properties, and important reactions such as nitration, halogenation, sulfonation, Friedel-Crafts alkylation, and acylation. The chapter also discusses substituted benzene compounds, directing effects of substituents, and the applications of aromatic hydrocarbons in dyes, pharmaceuticals, and polymers. Each concept is illustrated with examples, diagrams, and step-by-step explanations. These concepts are highly important for FSC board exams and entry tests like MDCAT, NUMS, AKU, NUST, and ECAT.
Free Entry Test Preparation
Mastery of aromatic hydrocarbons helps students understand reaction mechanisms, predict products, and solve numerical and conceptual problems. PLS Academy provides practice questions, solved past papers, and chapter-wise MCQs to help students revise these topics effectively. Regular study of this chapter improves problem-solving skills, conceptual clarity, and exam performance, ensuring students are well-prepared for FSC board exams, competitive entry tests, and NTS exams.
JazakAllah.
