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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Iso-osmotic solutions are those which have the same.
Choose an answer
Vapour pressure lowering
Osmotic pressure
Molality
Boiling point elevation
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Question # 2
Chlorination of benzene with excess chlorine in the presence of FeCl3 as Lewis acid gives.
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Chlorobenzene as a major product
o-dichlorobenzene as major product
p-dichloro benzene as an only product
A mixture of 0- and p- dichloro benzene
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Question # 3
Since the acid gives both acidic and normal salts so the acid is.
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di acid
di basic
double salt
Any of above
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Question # 4
The large increase in the rate of a reaction on rise in temperature is due to.
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The lowering of activation energy
The decreases in mean free path
The increase in collision frequency
The increase in the number of molecules having more than the threshold energy
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Question # 5
A 10% solution of sucrose contains 10 g of sucrose in how much volume of the solution.
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10 mL
100 mL
1000 mL
1 mL
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Question # 6
Which of the following has the highest melting poing.
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NaCl
Li Cl
KCl
Rb Cl
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Question # 7
Which of the following trace elements may be present in the particulate materials.
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Cadmium
Nickel
Mercury
Lead
All of the above
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Question # 8
Which of the following will exhibit variable electro Valency due to intert pair effect.
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Fe
Sn
K
Both Fe and Sn
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Question # 9
A closed system is one which can exchange with surrounding.
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Matter but not energy
Energy but not matter
Both matter and energy
Neither matter nor energy
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Question # 10
Is a peroxy acid
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H2SO5
H2S2O6
H2SO4
H2S2O7
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Question # 11
Which halide of cesium will be highly ionic in nature.
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K+
Ag+
Rb+
Ca+
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Question # 12
All naturally occurring processes spontaneously in a direction leads to.
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Decrease of entropy
Increase of entropy
Decrease in free energy
Increase in free energy
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Question # 13
Which of the following has the maximum tendency to form complexes.
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K
Na
Rb
Li
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Question # 14
Nano particles may interact with the support to be.
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Partially oxidized
Partically reduced
Both a and b
None
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Question # 15
A device which is used to measure the interracial angle is known as
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Voltmeter
Potentiometer
pH Meter
Goniometer
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Question # 16
The smog is essentially caused by the presence of.
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O3 and N2
O2 and N2
Oxides of sulphur and nitrogen
O2 and O3
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Question # 17
The reagent which can be used to distinguish acetophenone from benzophenone is.
Choose an answer
2,4 -dinito phenyl hydrazine
Li AIH4
Benedict reagetn
I2 and Na2CO3
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Question # 18
The correct order of reactivity among I , Ii, and III IS.
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i > ii >iii
i > iii > ii
II > III > I
III > II > I
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Question # 19
Toluene is o/p -orienting with respect to an electrophilic substitution reaction due to.
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+1 effect of the methyl group.
+1 as wellas +H effect of the methyl group
Hyper conjugatin between the methyl group and phenyl ring.
+ R effect of the methyl group
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Question # 20
Alnico is an alloy containing how many percent nickel.
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10%
14%
18%
22%
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Question # 21
Dull red flame is observed with
Choose an answer
Calcium salt
Barium salt
Strontium salt
Sodium salt
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Question # 22
Natural fertilizers are materials derived from
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Plants
Animal
Algae
All of above
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Question # 23
Which of the following is domain of industrial ecology.
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The materials extractor
The materials processor
The consumer
All of above
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Question # 24
The prefiex 'nano' comes from a
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French word meaning billion
Greek word meaning dwarf
Latin word meaning invisible
Spanish word meaning particle
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Question # 25
Which of the following statement is not true is case of catalytic reforming.
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Dehydrogenations high endothermic
Dehydrogenation is exothermic
Hydrodealkylation reactions are endothermic
None of these
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Question # 26
Which of the following can be used as drying agent of ammonia.
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CaO
Anhydrous CaCl2
P2O5
Conc. H2SO4
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Question # 27
The blue colour of CuSO4 disappears on adding Zn granules to it . it is because of .
Choose an answer
Oxidation of Cu atom
Oxidation of Zn
2+
Oxidation Cu
2+
Oxidation of Zn
2+
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Question # 28
Which of the following is strong adheaive.
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Epoxy resin
Melamine -formadehyde resin
Alkyd resins
Bakelite
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Question # 29
Which of the following factor is involved in band boarding that occur in column chromatography.
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Number of theoretical plates
Eddy diffusion
In phase mass transfer
All above
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Question # 30
Which of the following enthalpies is always negative.
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Enthalpy of melting
Enthalpy of combustion
Enthalpy of solution
Enthalpy of formation
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Question # 31
Oil of turpentine contains
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a-pinene
b- pinene
Both A and B
Name of these
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