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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Nitrobenzen can be prepared from benzene by using a mixture of conc. HNO3 and conc. H2SO4 In the nitrating mixture. HNO3 acts as a.
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Base
Acid
Oxidizing agent
Catalyst
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Question # 2
Commercial or the phosphoric acid is pure.
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37.0%
82.98%
88.25%
90.12%
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Question # 3
In the long form of periodic table, elements are arranged according to.
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Increasing atomic number
Decreasing atomic number
Increasing atomic mass
Decreasing atomic mass
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Question # 4
Which of the following has the maximum tendency to form complexes.
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K
Na
Rb
Li
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Question # 5
The value of an Einstein
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Is independent of wavelength
Decrease with increase in wavelength
Increase with increase in wavelength
Depends on the temperature of the absorbing system
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Question # 6
In bi sulphate ion, the formal charge on sulphru atom is.
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+1
+2
+4
+6
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Question # 7
A mordants is substance which in
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Coloured
Leuco -base of a dye
Fixes dye on the fabric
All of these
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Question # 8
In an isochoric process
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Energy remains constant
Volume remains constant
Pressure remains constant
Temperature remains constant
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Question # 9
Cobalt salt imparts which colour to the borax bead
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Blue
Green
Red
Yellow
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Question # 10
Which of the following elements has the highest melting point.
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Magnesium
Calcium
Strontium
Berylliium
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Question # 11
Which of the following is an important aspect of industrial ecology.
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Minimising air emissions
Minimising liquid waste
Recycling after use
All above
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Question # 12
Which of the following is not a polysaccharide
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Cellobiose
Cellulose
Insulin
Amylase
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Question # 13
The velocity possessed by maximum fraction of molecules at a given temperature is called.
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Average velocity
Root mean aquare velocity
Most probable velocity
None of the above
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Question # 14
Each fat or oil in made up of
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A distinctive mixture of several different triglycorides
A distinctive mixture of several aldehydes
Mixture of above both
None of above
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Question # 15
Hydrolith is the common name of
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NaH
CaH2
NaF
CaF2
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Question # 16
Select a basic amino acid.
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Glycine
Cystine
Alanine
Lysine
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Question # 17
Which of the following statement is not related to collision theory.
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Molecules must collide with each other to do a chemical reaction
Molecules must posses a minimum amount of energy
Molecules must have proper orientation
Collision theory is applicable to liquid only.
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Question # 18
Ionic reactions mainly take place in.
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Aqueous solutions and organic solvents of high polarity
Non aqueous solvents of low polarity
Gaseous state
Solid state
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Question # 19
Co enzyme cna be separated from enzyme by
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Precipitation
Dalysis
Hydrolysis
Distillation
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Question # 20
According to Usanovich concept a base is defined as any species.
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Capable of giving up anions
Combining with cations
Neutralizing an acid to give a salt
All of above
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Question # 21
Hydrogen at the moment of its generation is generally called.
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Protium
Nascent hydrogen
Atomic hydorgen
Heavy hydrogen
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Question # 22
Which of the following techniques does not belong to column chromatographyy
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TLC
HPLC
Electrophoresis
Ion exchange
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Question # 23
CoCl3 ,6NH3 has six NH3 molecules that satisfy the valency of the Cu3+ metal ion
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Primary
Secondary
Both A and B
None of above
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Question # 24
The word 'ceramic' meant for.
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Soft material
Hard material
Burnt material
Dry material
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Question # 25
Which of the following substance is most abundant of all components of atmospheric air.
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O2
N2
CO2
A2
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Question # 26
Which of the following pairs shows diagonal relationship
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Li and Mg
Na and K
Zn and Cd
Li and BE
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Question # 27
Any property whose magnitude is independent of the amount of substance present is called a/an
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Extensive property
Colligative property
Structural propety
Intensive property
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Question # 28
Most commercial glasses consist of
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Lime
Soda
Silica
All
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Question # 29
Sanger's reagent is
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Carbobenzyloxy chlride
Dimethyl amino sulphonyl chloride
I-Fluoro -2,4-dinitrobnzene
2,4- Dinitrophenyl hydrazine
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Question # 30
Which law of thermodynamics helps in calculating the absolute entropies of varies substances.
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Zeroth law
1st law
Second law
Third Law
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Question # 31
The hydrogen bond is strongest in.
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O - H .............S
S - H.............O
F- H....................F
F - H...............O
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