| 1 |
Hydrocarbons are divided into aliphatic, alicyclic and aromatic which structure among the following show an alicyclic hydrocarbon
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| 2 |
Benzene does not undergo
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A. Substitution reaction
B. Addition reaction
C. Oxidation reaction
D. Elimination reaction
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| 3 |
Amongst the following the compound that can be most readily sulphonated is
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A. Toluene
B. Benzene
C. Nitrobenzene
D. Chlorobenzene
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| 4 |
Alkyl halides when reduced with nascent hydrogen in the presence of Zn + HCI, are converted to
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A. Alkynes
B. Alkenes
C. Alkanes
D. Alcohol
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| 5 |
The C-C bond angles in benzene ring are
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A. 119°
B. 120°
C. 121°
D. None
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| 6 |
Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?
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A. Chlorination, nitration, reducing
B. Nitration, chlorination, reducition
C. Nitration, reduction,chlorination
D. Nitration, reduction, acylation, chlorination, hydrolysis
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| 7 |
Which of the following reaction is characteristic of benzene
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A. Electrophilic substitution reaction
B. Reduction
C. Oxidation
D. Ozonolysis
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| 8 |
The electron releasing effect of methyl group is significant and it makes ring a good
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A. Electrophilic
B. Nucleophilic
C. Nucleophobic
D. Hydrophobic
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| 9 |
The Total coal resources of Pakistan are estimated to be
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A. 184 billion
B. 184 million tones
C. 1.84 billion tounes
D. 1.84 million tonnes
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| 10 |
The addition of unsymmetrical reagent to unsymmetrical alkene is in accordance with the rule:
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A. Hund's rule
B. Markownikov's rule
C. Pauli's Exclusion Principle
D. Auf bau Principle
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| 11 |
The temp. used for the hydrogenation of alkenes using Ni is
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A. 2000°C
B. 400°C
C. 200-- 300°C
D. 1000°C
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| 12 |
The reaction in which ketone is reduced to the alkane is called
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A. Kolb
B. Clemmensen
C. Cannizzaro
D. None
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| 13 |
"Each different compound should have a different name" was published by IUPAC system of nomenclature in
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A. 1892
B. 1830
C. 1947
D. 1979
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| 14 |
The presence of a double bond in a compound in the sign of:
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A. Saturation
B. Unsaturation
C. Subsitution
D. None
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| 15 |
The compound prepared by a substitution reaction of benzene is
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A. Acetophenone
B. Glyoxal
C. Cyclohexame
D. Hexabromo cyclohexane
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| 16 |
C18and onward hydrocarbons are normally
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A. Gases
B. Liquids
C. Solids
D. Plasma
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| 17 |
Benzene is not prepared from
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A. Acetylene
B. Phenol
C. Benzoic acid
D. Bromo benzene
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| 18 |
The order of reactivity of halogens in aliphatic substitution reactions is
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A. Br2 > C12 > F2
B. C12 > Br2 > F2
C. C12 C12 > Br2
D. F2 > Br2 > C12
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| 19 |
When n-hexane is heated in the presence of Pt at 500°C, it cyclists to give
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A. Benzene
B. Cyclohexene
C. Benzene
D. Toluene
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| 20 |
The process in which orbitals of different energies and shapes mix with each other to give equivalent hybrid orbitals is called
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A. Isomerization
B. polymerization
C. Hybridization
D. Resonance
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| 21 |
Benzene does not undergo polymerization and it is also resistant to
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A. Reduction
B. Oxidation
C. Alkylation
D. Ozonolysis
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| 22 |
Preparation of ethylbenzene by the reaction of bromobenzene, ethylbromide and sodium is called
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A. Wurtz reaction
B. Fitting reaction
C. Wurtz fitting reaction
D. None of these
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| 23 |
The empirical formula of benzene is determined by
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A. IR spectra
B. U.V
C. Elemental analysis
D. NMR spectra
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| 24 |
An organic compound, on treatment with Br2 in CC14 gives bromoderivative of an alkene. The compound will be
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A. CH3 - CH = Ch2
B. CH3CH = CHCH3
C. HC = CH
D. H2C = CH2
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| 25 |
A salt producing hydrocarbon among these compounds is
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A. Ehyne
B. Ethene
C. Methane
D. Ethane
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| 26 |
Which of the following decolorized Br2-water
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A. Methane
B. Ethane
C. Ethene
D. Propane
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| 27 |
Write the name of following alkene CH2= CH - CH = CH2
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A. 1,3 butadiene
B. Butra -1, 3-diene
C. Both a & b
D. None
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| 28 |
Zn + HCI are used in
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A. Clemenson reduction
B. Wof kishner reduction
C. Kolb's electrolysis
D. Wutruz reaction
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| 29 |
Alkanes are least reactive towards:
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A. Acids and bases
B. Reducing agents
C. Oxidizing agents
D. All of these
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| 30 |
Which of the following acid can be used as a catalyst in Friedal Craft's reactions
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A. AlCl3
B. HNO3
C. BeCl2
D. NaCl
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