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PPSC Chemistry Part II Organic Chemistry Online Test MCQs With Answers
Question # 1
1-Butyne on oxymereuration -demercuration would give.
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Butanone
Butanal
Propanol and methanol
Propanoic acid and formic acid
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Question # 2
Hydrogen bons holding the strand to nucleic acids are formed between
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Sugar and base units
Base unit
Sugar ane phosphate units
Sugar units
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Question # 3
Which of the following dye is used an antiseptic .
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Methyl orange
Mercurochrome
Alizarin
Bismarck brown
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Question # 4
The study of coiled long peptide chains of protein to give a 3 dimensional structure is the study of.
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Primary structure
Secondary structure.
Tertiary structure
Quaternary structure.
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Question # 5
Which of the following statements is false about enantiomers.
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Rotate plane of polarized light
Are superimposable mirror images
Nbonsuperimposable mirror images
All of the above
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Question # 6
Which of the following does not represent Lewis base.
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Pyridine
NaNH2
PCl3
NaOH
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Question # 7
In order to give strength and elasticity natural rubber is heated with.
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Sulphur
Oxygen
Nitrogen
Chlorine
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Question # 8
Dyes used in photographic plates to make them panchromatic is.
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Cyanine dyes
Azine dyes
Phthalocyanine dyes
Acridine dyes
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Question # 9
The formation of daughter DNA's from parent DNA is called.
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Transalation
Transcription
Reproduction
Replication
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Question # 10
Monomer of natural rubber is
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1,3-Butadiene
2-Methyl -1,3-butadiene
1,2 -Butadiene
1,3 - Pentadiene
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Question # 11
Hydrolysis of protein gives
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a -amino acid only
b-amino acids only
gama amino acid only
A mixture of all of these
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Question # 12
Ingold's isoprence rule states that in terpenoids isopren units are joined.
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Head to tail
Head to head
Tail to tail
In a random order
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Question # 13
Which of the following reaction cannot be used for the synthesis of a amino acids.
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Gabriel phthalimide
Streckers synthesis
Sorensen synthesis
Schmidt synthesis
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Question # 14
The IUPAC name of C2H3, CO , OC OC2H5 in
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Prepanoic anhydride
Ethanoic anhydride
Diketoethoxy ether
None of the above
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Question # 15
Oxidative enzymes are responsible for
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Biological processes
Biological oxidation
Biological hydrolysis
Biological isomerisation
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Question # 16
Which of the following haloacids is stronger acids.
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FCH2COOH
ClCH2COOH
Br CH2COOH
ICH2COOH
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Question # 17
An example of nitro dyes is.
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Martius yellow
Auramine O
Malachite green
Methyl red
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Question # 18
High density polyethylene has which type of structure.
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Linear
Branch chain
Cross linked
Any one of these
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Question # 19
Which of the following is not a characteristics of terponoids.
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They are pleasant smelling liquids
They are steam volatile
They are nitrogenous bases
They are insoluble in water
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Question # 20
The speed of a chemical reaction
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Is constant no matter what the temperature is.
Is independent of the amount of contact surface of a solid involved
Between gases should is all cases be extremely repid because the average kinetic energy of the molecules is great
Between ions in aqueous solution is extremely rapid because there are no bonds that need to be broken
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Question # 21
Which of the following does not belong in the group of herocyclic dyes.
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Acridine
Cyanine
Methylene blue
Amido black
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