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PPSC Chemistry Part II Organic Chemistry Online Test MCQs With Answers
Question # 1
Amino acids have
Choose an answer
Acidic group
Basic group
Both of these
None of these
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Question # 2
Which of the following statements are correct for Linear polymers.
Choose an answer
Linear polymers may be condensation as well as addition polymers
Structure is well packed in nature
Linear polymers have higher density higher melting point and higher tensile strength
All are correct
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Question # 3
An impure sample of camphor contaminated with sand, can be purified by
Choose an answer
Distillation
Sublimation
Steam distillation
None of the above
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Question # 4
Which of the following haloacids is stronger acids.
Choose an answer
FCH2COOH
ClCH2COOH
Br CH2COOH
ICH2COOH
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Question # 5
Which of the following is not a pyrimidine base.
Choose an answer
Uracil
Thymine
Cytosine
Guanine
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Question # 6
Which of the following polymers is chlorinated.
Choose an answer
Orlon
Neoprene
Dacron
None of these
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Question # 7
Which of the following property has a higher value for trans isomer as compared to cis isomer.
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Density
Dipole moment
Melting point
Boiling point
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Question # 8
Which statement is false.
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If a reaction is thermodynamically spontaneous it may occur rapidly
If a reaction is thermodynamically spontaneous it may occur slowly.
Activation energy is a kinetic quantity rather than a thermodynamic quantity.
If a reaction is thermodynamics spontaneous, it must have a low activation energy.
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Question # 9
Which of the following is branch chain polymer.
Choose an answer
Glycogen
Terylene
PVC
Orlen
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Question # 10
All steroids on heating wish solenium give
Choose an answer
phenanthrene
Cholesterol
Diels hydrocarbon
Isoprene
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Question # 11
Apoenzyme is
Choose an answer
Hydrolytic enzyme
Oxidative enzyme
Coenzyme
Protein part of enzyme after removal of coenzyme
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Question # 12
Which of the following statement in not correct with respect to inductive effect.
Choose an answer
Bond length decrease with increase in inductive effect.
Inductive effect generates polar character in bonds
Variation in strength of aliphatic acids can be explained
It alone cna explain the basically of triphenylamine
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Question # 13
The dye which is a constituent of Skiffs reagent used for detection formaldehyde group is.
Choose an answer
Gentain violet
Megneta
Phenolphthalein
Rosolic acid
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Question # 14
Recrystallization is the most common technique of purification of solid organic substances Which of the following statements is not related with characteristics of a suitable solvent.
Choose an answer
It dissolves the substance on heating
It readily allows it to separate out in the form of crystal on cooling
It does not react chemically with substance
It does dissolve the impurities.
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Question # 15
Which is not true about polymers.
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Polymers do not carry any charge
Polymers have high viscosity
Polymers scatter light
Polymers have low molecular weight
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Question # 16
Which type of polymer the Nylon -06 is
Choose an answer
Polyamide
Polyester
Addition
Homopolymer
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Question # 17
Which of the following is not a characteristic of dye.
Choose an answer
It must have suitable colour
It must be able to fix to fibre
It must be fast to wash and lights
It must be highly soluble in water
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Question # 18
In propagation step the reaction intermediate of radical polymerization is
Choose an answer
Carbocation
Carbonion
Free radical
Carbene
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Question # 19
The deficiency of which vitamin leads to beri brainteaser
Choose an answer
Thiamine
Riboflavin
Pyridoxine
Asorbic acid
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Question # 20
An example of acyclic polytropenoid is
Choose an answer
Myrcone
Buna -S
Synthetic rubber
Natural rubber
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Question # 21
The number of hydrogen bonds boding A _____ T pair is
Choose an answer
1
2
3
4
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