PPSC Lecturer of Chemistry Past Paper
1) When an electron is brought from infinite distance close
to the nucleus of the atom, the energy of
Electron-nucleus system?
(a) increases to a smaller negative value (b) decreases to a
greater negative value
(c) decreases to a smaller positive value (d) increases to a
greater positive value
2) The probability of finding the electron in the nucleus
is:
(a) 100% due to forces of attraction (b) finite for all
orbitals
(c) Zero for all orbitals (d) Zero for some orbitals and
finite for others
3) When Zn metal is kept in CuSO4solution, copper is
precipitated and ZnSO4is formed because:
(a) Atomic number of Zinc is smaller than copper
(b) Atomic number of Zinc is larger than copper
(c) Standard reduction potential of Zinc is more than that
of copper
(d) Standard reduction potential of Zinc is less than that
of copper
4) Electrolytes when dissolved in water, dissociate into
their constituent ions, the degree of
dissociation of an electrolyte increases with the:
(a) Presence of a substance yielding common ion
(b) Decreasing temperature
(c) Decreasing concentration of electrolyte
(d) Increasing concentration of electrolyte
5) There is a large positive entropy change for an
exothermic reaction. It means that the reaction
will be:
(a) possible at high temperatures only (b) impossible at all temperatures
(c) possible at low temperatures only (d) possible at all
temperatures
6) Which of the following statement is false?
(a) the temperature of the system will fall if an exothermic
reaction is isolated from its
surroundings
(b) Energy is absorbed when one compound is converted into
another with higher heat content
(c) the temperature of the system is likely to fall if heat
is absorbed during the course of a
reaction(d) None of these
7) pH + pOH of a solution is:
(a) 7 (b) Zero (c) 14
(d) -14
8) The compound that is not Lewis acid:
(a) BF3 (b) BaCl2 (c) SnCl4 (d) AlCl3
9) Ore of Aluminium:
(a) Calamine (b) Dolomite (c) Bauxite (d) Limestone
10) Oxidation number of S in sulphuric acid:
(a) Four (b) Six (c) Two (d) Eight
11) d-block elements form coordination compounds because of:
(a) Small Cationic size (b) Large ionic Charge
(c) Unfilled d-orbitals (d) Filled d-orbitals
12) Brass is an alloy of:
(a) Cu and Zn (b) Cu, Ni, Zn (c) Cu and Ni (d) Cu, Al, Zn
13) Urea is a high quality nitrogenous fertilizer with:
(a) 76% nitrogen (b) 46% nitrogen (c) 66% nitrogen (d) 26%
nitrogen
14) Diamond is:
(a) Good conductor of electricity (b) Bad conductor of
electricity
(c) Bad conductor on heating
(d) Good conductor on heating
15) Carbon monoxide is poisonous gas because it:
(a) replaces oxygen from lungs (b) forms carboxy haemoglobin
(c) Forms carbon dioxide with oxygen (d) has a sweet smell
16. Rust is:
(a) FeO + Fe(OH)2 (b) Fe2O3 + Fe(OH)2 (c) Fe2O3 (d) Fe2O3 +
Fe(OH)3
17) Calcium Carbide reacts with water to give:
(a) Methane (b) Ethylene (c) Acetylene (d) Ethane
18. Which of the following substituent deactivates benzene
ring and is o, p-directing?
(a) __ NH2 (b) __ Cl (c) __ OCH3 (d) __ OH
19) Which of the following is most readily nitrated?
(a) Toluene (b)
Benzaldehyde (c) Nitrobenzene (d)
Benzoic Acid
20) Ketones can be prepared by reaction of Grignard reagent
with:
(a) Acid Amides (b) Acid Chloride (c ) Carboxylic Acid (d)
Epoxides
21) Which of the following statements about the order of
reaction is true?
(a) The order of a reaction can only be determined by
experiment.
(b) A second order reaction is also bimolecular
(c) The order of reaction must be a positive integer
(d) The order of reaction increases with increasing
temperature.
22 Polysaccharides yield many monosaccharides on:
(a) Hydration (b) Oxidation (c) Reduction (d) Hydrolysis
23) Which of the following is not aromatic?
(a) Benzene (b)
cyclooctatetraene (c) Pyridine (d) Phenol
24) Which of the following is most basic?
(a) H2O (b) NH3 (c) CH3NH2 (d) CH3OH
25) Which of the following has lowest pH?
(a) CH3COOH (b) CF3COOH (c) ClCH2COOH (d) Cl3C COOH
26) The equilibrium of two readily interconvertible isomers
is called:
(a) Stereoisomerism (b) Metamerism (c) Tautomerism (d)
Polymorphism
27) Which of the following compounds exhibit geometrical
isomerism?
(a) 1-Pentene (b) 2-Pentene (c) 2-methyl –2-Pentene (d)
2-methyl –2-Butene
28) Which of the following gives a tertiary alcohol when
treated with Grignard reagent:
(a) HCHO (b) CH3CHO (c) C3H5CHO (d) CH3COCH3
29) Which of the following tests is not used to identify
aldehydes?
(a) Tollen’s test (b) Benedict solution test (c) Fehling
solution test (d) Ammonia test
30) Which is incorrect about alkaloids?
(a) Naturally Occuring (b) Possess a hetrocyclic ring
(c) Exhibit biological action (d) acidic in nature
31) Which of the followings will not give iodoform test:
(a) Acetone (b) Ethylacohol (c) Benzaldehyde (d)
Acetaldehyde
32) The reaction of aniline with bromine water gives:
(a) o-bromoaniline (b) p-bromoaniline (c) 2,4-dibromoaniline
(d) 2,4,6-tribromoaniline
33) The reaction of tripalmitin, with sodium hydroxide is
called:
(a) Hydrolysis (b) Saponification (c) Esterification (d)
Combustion
34) Which one is not Petrochemical?
(a) Napthalene (b) Mineral Oil (c) Wax (d) Table Salt
35) Chemical adsorption:
(a) is exothermic (b) is irreversible (c) takes place at
high temp. (d) All of these
36) The most commonly used absorbent for chromatographic
separation of organic compound is:
(a) Activated charcoal (b) Fuller’s Earth (c) Alumina (d)
Silica gel
37) Grignard reagent is:
(a) Organo Zinc halide (b) Organo cadmium bromide
(c) n-Butyl Lithium (d) Organo Magnesium halide
38) Which one of the
following is not a petrochemical.
(a) Cumene (b) Paraffin (c) Aluminum Chloride (d) Epoxy
resin
39) The term
syndiotactic is related to which one of the following?
(a) Synthetic detergents (b) Table Salt (c) Paraffin (d)
Polyprophylene
40 Which one of the
following is used as an Antibiotic?
(a) Patulin (b) Insulin (c) Soserine (d) Trypsin
41) Heroin is
diacetate of:
(a) Papaverine (b) Morphine(c) Codeine (d) Thebaine
42) A reaction that
practically is given by all organic compounds.
(a) Elimination (b) Friedel-Craft ecylation (c) Combustion
(d) Rearrangement
43) Which functional
group is present in polyester shirt?
(a) Lactam (b) Acid Chloride (c) Ether (d) Ester
(xviii) Which statement is true for Halogen (Halo-group)?
(a) Activating and O, p–directing (b) Activating and
m–directing
(c) Deactivating and O, p–directing (d) None of these.
(44) Which one of the
following can be synthesized from Aryl Diazonium Salt?
(a) Furfural (b) Carbylamine (c) Biphenyl (d) THF
(45 The Methyl group
in Methyl Magnesium Iodide can act as:
(a) CH3Radical (b) CH3Carbonium ion (c) CH3Carbanion (d) Can
react with a base
46) Nylon is a
copolymer of:
(a) Urea and Formaldehyde (b) Phenol and Formaldehyde
(c) Hexamethylenediamine and adipic acid (d) Vinyl Chloride
and Vinylalcohol
(47) Which of the
following would react with one mole of Grignard’sreagent to yield a ketone?
(a) R R RCON ′ ′ ′ (b) R RCONH ′(c) RCONH2(d) RCOOH
48) Glyceraldehyde
has one ofthe following properties:
(a) One asymmetric carbon atom(b) Two asymmetric carbon
atoms
(c) A meso compound (d) Four asymmetric carbon atoms
49 The ant
ifreeze compound ethylene glycol has the formula:
(a) C2H5OH (b) CH3OH (c) C2H4(OH)2(d) C3H5(OH)3
50 Distillation is
the best method for separating the two substances in which of the following:
(a) Water and salt dissolved
(b) water and a substance which does not dissolve in it
(c) Two liquids that have different boiling points
(d) Two solids that have different melting points.
PPSC Lecturer Chemistry MCQs Sample Past Papers
1) When an electron is brought from infinite distance close
to the nucleus of the atom, the energy of Electron-nucleus system?
(a) increases to a smaller negative value (b) decreases to a
greater negative value
(c) decreases to a smaller positive value (d) increases to a
greater positive value
2) The probability of finding the electron in the nucleus
is:
(a) 100% due to forces of attraction (b) finite for all
orbitals
(c) Zero for all orbitals (d) Zero for some orbitals and
finite for others
3) When Zn metal is kept in CuSO4solution, copper is
precipitated and ZnSO4is formed because:
(a) Atomic number of Zinc is smaller than copper
(b) Atomic number of Zinc is larger than copper
(c) Standard reduction potential of Zinc is more than that
of copper
(d) Standard reduction potential of Zinc is less than that
of copper
4) Electrolytes when dissolved in water, dissociate into
their constituent ions, the degree of
dissociation of an electrolyte increases with the:
(a) Presence of a substance yielding common ion
(b) Decreasing temperature
(c) Decreasing concentration of electrolyte
(d) Increasing concentration of electrolyte
5) There is a large positive entropy change for an
exothermic reaction. It means that the reaction
will be:
(a) possible at high temperatures only (b) impossible at all
temperatures
(c) possible at low temperatures only (d) possible at all
temperatures
6) Which of the following statement is false?
(a) the temperature of the system will fall if an exothermic
reaction is isolated from its
surroundings
(b) Energy is absorbed when one compound is converted into
another with higher heat content
(c) the temperature of the system is likely to fall if heat
is absorbed during the course of a
reaction(d) None of these
7) pH + pOH of a solution is:
(a) 7 (b) Zero (c) 14 (d) -14
8) The compound that is not Lewis acid:
(a) BF3 (b) BaCl2 (c) SnCl4 (d) AlCl3
9) Ore of Aluminium:
(a) Calamine (b) Dolomite (c) Bauxite (d) Limestone
10) Oxidation number of S in sulphuric acid:
(a) Four (b) Six (c) Two (d) Eight
11) d-block elements form coordination compounds because of:
(a) Small Cationic size (b) Large ionic Charge
(c) Unfilled d-orbitals (d) Filled d-orbitals
12) Brass is an alloy of:
(a) Cu and Zn (b) Cu, Ni, Zn (c) Cu and Ni (d) Cu, Al, Zn
13) Urea is a high quality nitrogenous fertilizer with:
(a) 76% nitrogen (b) 46% nitrogen (c) 66% nitrogen (d) 26%
nitrogen
14) Diamond is:
(a) Good conductor of electricity (b) Bad conductor of
electricity
(c) Bad conductor on heating (d) Good conductor on heating
15) Carbon monoxide is poisonous gas because it:
(a) replaces oxygen from lungs (b) forms carboxy haemoglobin
(c) Forms carbon dioxide with oxygen (d) has a sweet smell
16. Rust is:
(a) FeO + Fe(OH)2 (b) Fe2O3 + Fe(OH)2 (c) Fe2O3 (d) Fe2O3 +
Fe(OH)3
17) Calcium Carbide reacts with water to give:
(a) Methane (b) Ethylene (c) Acetylene (d) Ethane
18. Which of the following substituent deactivates benzene
ring and is o, p-directing?
(a) __ NH2 (b) __ Cl (c) __ OCH3 (d) __ OH
19) Which of the following is most readily nitrated?
(a) Toluene (b) Benzaldehyde (c) Nitrobenzene (d) Benzoic
Acid
20) Ketones can be prepared by reaction of Grignard reagent
with:
(a) Acid Amides (b) Acid Chloride (c ) Carboxylic Acid (d)
Epoxides
21) Which of the following statements about the order of
reaction is true?
(a) The order of a reaction can only be determined by
experiment.
(b) A second order reaction is also bimolecular
(c) The order of reaction must be a positive integer
(d) The order of reaction increases with increasing
temperature.
22 Polysaccharides yield many monosaccharides on:
(a) Hydration (b) Oxidation (c) Reduction (d) Hydrolysis
23) Which of the following is not aromatic?
(a) Benzene (b) cyclooctatetraene (c) Pyridine (d) Phenol
24) Which of the following is most basic?
(a) H2O (b) NH3 (c) CH3NH2 (d) CH3OH
25) Which of the following has lowest pH?
(a) CH3COOH (b) CF3COOH (c) ClCH2COOH (d) Cl3C COOH
26) The equilibrium of two readily interconvertible isomers
is called:
(a) Stereoisomerism (b) Metamerism (c) Tautomerism (d)
Polymorphism
27) Which of the following compounds exhibit geometrical
isomerism?
(a) 1-Pentene (b) 2-Pentene (c) 2-methyl –2-Pentene (d)
2-methyl –2-Butene
28) Which of the following gives a tertiary alcohol when
treated with Grignard reagent:
(a) HCHO (b) CH3CHO (c) C3H5CHO (d) CH3COCH3
29) Which of the following tests is not used to identify
aldehydes?
(a) Tollen’s test (b) Benedict solution test (c) Fehling
solution test (d) Ammonia test
30) Which is incorrect about alkaloids?
(a) Naturally Occuring (b) Possess a hetrocyclic ring
(c) Exhibit biological action (d) acidic in nature
31) Which of the followings will not give iodoform test:
(a) Acetone (b) Ethylacohol (c) Benzaldehyde (d)
Acetaldehyde
32) The reaction of aniline with bromine water gives:
(a) o-bromoaniline (b) p-bromoaniline (c) 2,4-dibromoaniline
(d) 2,4,6-tribromoaniline
33) The reaction of tripalmitin, with sodium hydroxide is
called:
(a) Hydrolysis (b) Saponification (c) Esterification (d)
Combustion
34) Which one is not Petrochemical?
(a) Napthalene (b) Mineral Oil (c) Wax (d) Table Salt
35) Chemical adsorption:
(a) is exothermic (b) is irreversible (c) takes place at
high temp. (d) All of these
36) The most commonly used absorbent for chromatographic separation
of organic compound is:
(a) Activated charcoal (b) Fuller’s Earth (c) Alumina (d)
Silica gel
37) Grignard reagent is:
(a) Organo Zinc halide (b) Organo cadmium bromide
(c) n-Butyl Lithium (d) Organo Magnesium halide
38) Which one of the following is not a petrochemical.
(a) Cumene (b) Paraffin (c) Aluminum Chloride (d) Epoxy
resin
39) The term syndiotactic is related to which one of the
following?
(a) Synthetic detergents (b) Table Salt (c) Paraffin (d)
Polyprophylene
40 Which one of the following is used as an Antibiotic?
(a) Patulin (b) Insulin (c) Soserine (d) Trypsin
41) Heroin is diacetate of:
(a) Papaverine (b) Morphine(c) Codeine (d) Thebaine
42) A reaction that practically is given by all organic
compounds.
(a) Elimination (b) Friedel-Craft ecylation (c) Combustion
(d) Rearrangement
43) Which functional group is present in polyester shirt?
(a) Lactam (b) Acid Chloride (c) Ether (d) Ester
(xviii) Which statement is true for Halogen (Halo-group)?
(a) Activating and O, p–directing (b) Activating and
m–directing
(c) Deactivating and O, p–directing (d) None of these.
(44) Which one of the following can be synthesized from Aryl
Diazonium Salt?
(a) Furfural (b) Carbylamine (c) Biphenyl (d) THF
(45 The Methyl group in Methyl Magnesium Iodide can act as:
(a) CH3Radical (b) CH3Carbonium ion (c) CH3Carbanion (d) Can
react with a base
46) Nylon is a copolymer of:
(a) Urea and Formaldehyde (b) Phenol and Formaldehyde
(c) Hexamethylenediamine and adipic acid (d) Vinyl Chloride
and Vinylalcohol
(47) Which of the following would react with one mole of
Grignard’sreagent to yield a ketone?
(a) R R RCON ′ ′ ′ (b) R RCONH ′(c) RCONH2(d) RCOOH
48) Glyceraldehyde has one ofthe following properties:
(a) One asymmetric carbon atom(b) Two asymmetric carbon
atoms
(c) A meso compound (d) Four asymmetric carbon atoms
49 The ant
ifreeze compound ethylene glycol has the formula:
(a) C2H5OH (b) CH3OH (c) C2H4(OH)2(d) C3H5(OH)3
50 Distillation is the best method for separating the two
substances in which of the following:
(a) Water and salt dissolved
(b) water and a substance which does not dissolve in it
(c) Two liquids that have different boiling points
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