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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
The atomic number of potassium is 19 and that of mangness is 25 Although the colour of MnO4 is dark violet yet the K+ is colourless this is due to the fact that.
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Mn is a transition element while K+ is not
[MnO4]- is negatively charged while K+ has positive charge
The effective atomic number of Mn is [MnO4]- is 26: while for K+ the atomic number is 18
The Mn is a high positive oxidation state allows charge transfer transitions.
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Question # 2
During sintering densification is not due to
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Atomic diffusion
Surface diffusion
Bulk diffusion
Surface tenstion
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Question # 3
White Phosphorus is kept under
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Cold water
Ammonia liquor
Ethanol
Kerosene
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Question # 4
Which of the following statements is not correct.
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The conductance of one cm3 of a material is called specific conductance
Specific conductance increase while equivalent conductance decreases on progressive dilution
The limiting equivalent conductance of weak electrolytes cannot be determined by extrapolation of the plot of A against concentration
The conductivity of metals is due to the movement of elctrons.
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Question # 5
Which of the following factors does not effect the rate of the reaction.
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Pressure
Temperature
Concentration
Catalyst
All of the above
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Question # 6
Which of the following statements is not related with joule Thomson effect.
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Joule Thomson is 0 isenthalpic in nature
H2 and He show heating effect
All gases show change in temperature
The change in temperature depends on initial temperature and nature of the gas.
Joule Thomson coefficient is defined as meo= (op/oT)H
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Question # 7
The azimuth or angular quantum number (i) determines the number of sob shells in a given shall. the allowed values of l for a given value ffor n are.
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1.2.3.......................
1,2,3 ..................(n-1)
0.1.2.3................(n-1)
2,4,6,..............(n-2)
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Question # 8
Alnico is an alloy containing how many percent nickel.
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10%
14%
18%
22%
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Question # 9
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 # 10
The emission of light characteristics of metal and correlation of intensity of the light emitted with concentration of that metal forms the basis of.
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Roman spectroscopy
IR spectroscopy
Flame photometry
Rotational spectroscopy
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Question # 11
Which of the following statement represent advantages of sanitary Landfill
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Economical method
Low initial investment
Flexible daily capacity
All above
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Question # 12
The extinction co efficient has the units.
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cm2 mol -1
cm3 mol-1
mol cm-3
mol cm-1
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Question # 13
The most stable oxidation state of chromium is.
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+6
+3
+4
+2
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Question # 14
Carbohydrates are characterized by the presence of.
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Hydroxyl group
Carbony group
Asymmetric carbon
All of these
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Question # 15
Glass electrode cannot be used to measure the pH of pure.
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Acetic acid
Ethyl alcohol
Gelatin
All above
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Question # 16
Polyethylene Glycols are used in the preparation of which tye of detergetns.
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Cationic detergents
Anionic detergents
Non ionic detergent soaps
None of above
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Question # 17
Which of the following are neutral ligands.
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NH3
H2O
CO & NO
All of above
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Question # 18
According to Arrhenius theory an acid is defined as substance which
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Accepts and electron pair
Donatees H+ ion in ammonia
Contains Cl- ions
Furnishes H3O + ion in water
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Question # 19
The reciprocal of the coefficient of viscosity in called.
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Density
Specific gravity
Fluidity
Conductance
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Question # 20
The theoretical plate in chromatography is represented by how many equilibrium step
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One
Two
Three
Four
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Question # 21
Which of the elements of group II A has the highest value of IE.
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Mg
Be
Ca
Sr
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Question # 22
The valence shell electronic configuration of group III A is.
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ns1 p2
ns2 p1
ns3p2
ns2p2
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Question # 23
Which of the following methods is used in qualitativ eanalysis.
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Physical method
Chemical method
Instrumental method
All above
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Question # 24
Which of the following statements is not a part of Bohr's theory of the hydrogen atom.
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An electron in an atom revolves aroung the nucleus only in circular paths.
An electron does not absorb energy in the stationary orbit
An electron does not emit energy in the stationary orbit
Energy is emitted or absorbed in a discrete amount from the stationary orbit
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Question # 25
Which of the following technique has flame as a source of excitation energy.
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UV spectroscopy
I-R spectrocscopy
Flame photometry
Raman spectroscopy
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Question # 26
Reaction in which molecules absorbing light do not themselves react but induce other moleculaes to react are called.
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Chain reactions
Photosenaitized reactions
Reversible reactions
Free radical reactions
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Question # 27
Which of the following is not an androgen i.e. male sex hormones.
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Androsterone
Testosterone
Oestrone
All of these are make hormone
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Question # 28
The Ostwald process is the main method for the manufacture of nitric Acid in the fist step in this process is.
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Nitrogen and hydrogen react to form NH3
Ammonia is burned in O2 to generate N2 and H2O
Nitrogen and oxygen react to form NO2
Ammonia is burned with O2 to generate NO and H2O
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Question # 29
The term 'brass' is very commonly used to designate any alloy primarily of.
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Copper and zinc
Aluminum and iron
Copper and aluminum
Zinc and nickel
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Question # 30
Which of the following is most soluble in water.
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BaSO4
Sr SO4
CaSO4
MgSO4
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Question # 31
A covalent bond which is formed between two atoms by the overlap of atomic orbitals along their axis is called.
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Pi bond
Sigma bond
Polar bond
Non polar bond
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