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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Which of the following statements is not related with chemical equilirbium.
Choose an answer
The properties of the system become constant
The equilibrium can be approached from either direction
The chemical equilibrium is static is nature
A catalyst can hasten the approach towards equilibrium
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Question # 2
Commercial detergents contain mainly ___________
Choose an answer
RCOON
RONa
RSNa
All above
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Question # 3
Which of the following solution has pH= 11?
Choose an answer
1 X 10
-11
m NaOH
1 x 10
-11
m HCl
1 x 10
-3
M NaOH
1 X 10
3
M NaOH
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Question # 4
The particle would be stationary in a lattice only at.
Choose an answer
273 K
0 K
298 K
373 K
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Question # 5
Which of the following gas protects us form harmful effect of uv radiation.
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SO2
NO2
CO
O3
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Question # 6
Correct order of increasing ______ I effect of groups is
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----- NO2 >-----------CN > ------------COOH > -------------F
--------F > -------------COOH>----------CN>--------NO2
-----F> -------------CN>--------NO2 > COOH
-------CN > ------------COOH > -----------NO2 >----------F
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Question # 7
In the Aluminothermite process, aluminium acts as.
Choose an answer
An oxidizing agent
A reducing agent
A flux
A Solder
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Question # 8
The formula of copper pyrite is.
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CuFeS
CuFeS2
Cu2FEs
Cu Fe2S
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Question # 9
Which of the following process is used for the removal of gases.
Choose an answer
Precipitation
Chemical reaction in the atmosphere
Absorption
All above
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Question # 10
Dull red flame is observed with
Choose an answer
Calcium salt
Barium salt
Strontium salt
Sodium salt
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Question # 11
What is the equilibrium temperature of transformation of austenite to pearlite
Choose an answer
1000 F
1333 F
166 6 F
1222 F
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Question # 12
Transition elements, in general, exhibit the following properties, except one, Name that property.
Choose an answer
Variable oxidation state
Natural radioactivity
Tendency to form complexes
Formation of alloys
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Question # 13
Which of the following molecules can oxhibit geometrical isomerism.
Choose an answer
CH3CH = CH2
CH3CH = CHCH3
(CH3)2 C = CH2
CH3CH = C(CH3)2
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Question # 14
Which of the following physical property forms the basis of radio chemicals methods of analysis.
Choose an answer
Absorption of light
Emission of light
Radioactivity
Thermal conductivity
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Question # 15
Argon is used in filling of.
Choose an answer
Discharge tubes
Luminous tube
Fluorescent tubes
None of above
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Question # 16
The vapour pressure of a liquid
Choose an answer
Always increase's with temperature
Always decreases with temperature
Is independent of temperature
Increase up to the boiling point
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Question # 17
Which of the following analytical method is used for the separation of dissolved components from solutions.
Choose an answer
Chromatography
Dialysis
Solvent extraction
Distillation
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Question # 18
Elements in the same vertical group of the periodical have same
Choose an answer
Number of electron
Atomic number
Number of valence elections
Electronic configuration
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Question # 19
The rate of a chemical reaction is proportional to the product of the active mean of the reactants, This is a statement of.
Choose an answer
Law of dynamic equilibrium
Le Chatlier's principle
Law of mass action
Solubility product principle
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Question # 20
Which of the following is not a component of AAS.
Choose an answer
Hollow cathode lamp
Burner
Detector
Tungsten lamp
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Question # 21
Biogical role of nucleic acid doe snot include
Choose an answer
Genetic continuity
Protein syathesis
Hybridization
Mutation
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Question # 22
Apoenzyme is
Choose an answer
Hydrolytic enzyme
Oxidative enzyme
Coenzyme
Protein part of enzyme after removal of coenzyme
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Question # 23
Ozone layer of stratosphere requires protection from indiscriminate use of.
Choose an answer
Fungicides, insecticides, bactericides and medicines
Aerosols and high flying jets
Atomic explosions and industrial wastes
Weather ballons
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Question # 24
Each of the following compound react with Grignard's reagent to form alkane exxcept.
Choose an answer
Ethanal
Ethanoic acid
Ethanol
Ethync
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Question # 25
Which of the following acid radical is not interfering.
Choose an answer
Phosphate
Borate
Flouride
Sulphate
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Question # 26
The current voltage characteristics forms the basis of.
Choose an answer
Thermal analysis
Potentiometry
Polarography
Colorimetry
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Question # 27
Chief source of water and soil pollution in
Choose an answer
Mining of ores
Thermal power plant
Agro industry
All the above
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Question # 28
The key element to be considered when evaluating a health hazard is.
Choose an answer
The amount of material the employee is exposed.
The total time of exposure
The toxicity of the substance
All above
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Question # 29
The units of surface tension in SI system are
Choose an answer
Joule m-1
Newton m-1
Erg cm-1
Dynes cm-2
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Question # 30
Usually the rate of the reactions is expressed as.
Choose an answer
mol dm-1
mol dm-3 s-1
mol dm-2 s-1
mol 2 dm-3 s-1
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Question # 31
Indigotin is a dye obtained from indigo plant which belongs to the group of.
Choose an answer
Substantive dyes
Mordant dyes
Vat dyes
Disperse dyes
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