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PPSC Chemistry Part II Organic Chemistry Online Test MCQs With Answers
Question # 1
The reduction of an alkyne to alkene using Lindlar's catalyst results into
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Syn addition of hydrogen atoms
Anti addition of hydrogen atoms
A mixture obtained by ayn and anti addition of hydrogen which are equilibrium with each other
A mixture obtained by syn and anti addition of hydrogen which are not in equilibrium with each other.
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Question # 2
The vitamin which is related to monossaccharides is.
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Vitamin A
Vitamin C
Vitamin D
Vitamin E
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Question # 3
Process of separating the racemic mixture into optically active isomers is known as.
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Resolution
Racemisation
Walden inversion
Epimerization
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Question # 4
1-Chlorobutane on reaction with alcohols potash gives.
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1- butane
1-butanol
2- butane
2- butanol
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Question # 5
Which of the following statement is not correct n respect of Arrhenius concept.
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The concept is applicable only for aqueous systems.
Neutralization takes place in aqueous mediam only
TH+ ion cannot remain as such in water
This concept is applicable for non aqueous system only.
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Question # 6
Which of the following factors effect the strengths of acids and bases.
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Inductive effect
Romance effect
Hydrogen effect
All above
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Question # 7
The bond length of C = C is
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1.20 A
o
1.34 A
o
1.54 A
o
1.68 A
o
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Question # 8
Estimation of nitrogen in proteins is generally arrived out by the method.
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Duma's method
Van Slyke method
Kjeldahl's method
Carius method
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Question # 9
Which of the following statement in not correct with respect to inductive effect.
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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 # 10
Casionic polymerization is initiated by
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BF3
NaNH2
Bul
Both b and c
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Question # 11
Among the following a good solvent for a Grignard reagent formation would be.
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t- butanol
dimethyl ether
difiuoro ethane
tetrahyudroform
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Question # 12
Glycerol on dehyeration gives
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Allyl alcohol
Aerolein
CHOH = C= CHOH
-CHO -CHOH -CH2OH
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Question # 13
The dyes which are produced on the fibre in suit by reactions are known as.
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Mordant dyes
Fast dyme
Ingrain dyes
Disperse dyes
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Question # 14
Which of the following statements regarding phenols is not correct.
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Phenol ls are stronger acids than water and alcohols.
Phenol are weaker acids than carboxylic acids
Phenol are solubel in both aqueous NaOH and aqueous sodium hydrogen carbonate
Phenoxides ions are more stable than the corresponding phenol
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Question # 15
a -amino acids when heated alone form
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Cyclic lactum
a-b-unsaturated acid
Fatty acids
Diketopiperzines
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Question # 16
An aromatic compound has a molecules formula C7H8O. How many isomers are possible for this compound.
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3
4
5
6
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Question # 17
Different arrangement of groups in space which can be converted into one another by rotation around a single bond are caled.
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Conformations
Metameres
Enatiomers
All of the above
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Question # 18
The compounds whose formation require a host compound and a guest compound are called.
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Exclusion compounds
Inclusion compounds
Crystal compounds
None of the above
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Question # 19
Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives.
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o - creaol
p - creaol
2,4 -dihydroxy toluene
Benzoic acid
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Question # 20
Which of the following is most basic.
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Aniline
Benzylamine
Diphenylamine
N-methylaniline
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Question # 21
An stereospecific enzyme in one which catalyses
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Formation of one stercolsomer
Reaction of one stereoisomer only
Both of these
None of these
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