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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Which of the following device is used to measure the surface tension.
Choose an answer
Polarimeter
Viscometer
Refractometer
Stalagnameter
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Question # 2
The melting of nearly all glass is done in a continuous tank furnace. which operates steadily over periods of up to.
Choose an answer
a day
a month
a year
None of these
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Question # 3
Chlorine when attached to benzene has
Choose an answer
+1 and + R effect
-1 and - R effect
-1 and +R effect
None of the above
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Question # 4
Of the following an amphoteric hydroxide is.
Choose an answer
Ca(OH)2
NaOH
Be (OH)2
Li OH
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Question # 5
_________ is preferred for horticultural crops and for tobacco and potatoes.
Choose an answer
Potassium Chloride
Potassium Sulphate
Potassium NItrate
None of these
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Question # 6
The molecule returns from the first excited triplet sate to the ground state singlet. The light emitted in known as.
Choose an answer
Inter system crossing
Phosphorescence
Fiuoreacence
Quenching
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Question # 7
The Lewis structure of which of the following does not have coordinate bond.
Choose an answer
SO2
HNO3
H2SO4
HNO2
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Question # 8
Sanger's reagent is
Choose an answer
Carbobenzyloxy chlride
Dimethyl amino sulphonyl chloride
I-Fluoro -2,4-dinitrobnzene
2,4- Dinitrophenyl hydrazine
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Question # 9
The total number of bond pairs around sulphur and total number of lone pairs around oxygen atoms in the Lewis structure of sulphate ion are respectively.
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4, 12
8,12
12,4
6 ,12
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Question # 10
In biological ecosystem which of the following substance is used by organisms.
Choose an answer
Water
Sunlight
Minerals
All above
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Question # 11
Allotropic form of tin
Choose an answer
White tin
Grey tin
Rhomic tin
All above
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Question # 12
Which of the following can be used as drying agent of ammonia.
Choose an answer
CaO
Anhydrous CaCl2
P2O5
Conc. H2SO4
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Question # 13
The splitting of H2O can be carried out through
Choose an answer
Photolysis
Electrolysis
Dialysis
Hydrogenation
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Question # 14
When a lead a storage battery is discharged .
Choose an answer
SO2 is evolved
PbS is consumed
Pb is formed
H2SO4 is consumed
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Question # 15
The percentage of s-character in the hybrid orbitals sp, sp2 and sp3 follows the pattern.
Choose an answer
sp3 > sp2 > sp
sp > sp2 > sp3
sp = sp2 >sp3
sp = sp2 =sp3
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Question # 16
Chlorination of benzene with excess chlorine in the presence of FeCl3 as Lewis acid gives.
Choose an answer
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 # 17
Which of the following has maximum number of unpaired electrons.
Choose an answer
Fe3+
Fe2+
Co2+
CO3+
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Question # 18
Which of the following carbonates decomposes at the highest temperature.
Choose an answer
Mg CO3
CaCO3
Sr CO3
Ba CO3
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Question # 19
Relative order of acidity of oxy acid
Choose an answer
HCIO > HCIO2 > HCIO3 > HCIO4
HCIO4 > HCIO3 >HCIO2 > HCIO
HCIO3 > HCIO2 > HCIO > HCIO4
HCIO2 > HCIO4 > HCIO3 > HCIO
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Question # 20
Detergents are known to pollute revers and water ways. However, detergents can be made biodegradable and pollution free by taking.
Choose an answer
cyclic hydrocarbon chain
Shorter hydrocarbon chain
Unbranched hydrocarbon chain
Benzenoid hydrocarbons
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Question # 21
Which of the following statements do not represent Lewis idea of acids and base?
Choose an answer
Compounds which have completely filled orbitals
Compounds which have incompletely filled orbitals
Compounds in which the central atom can expand its octel
All simple metal ions like Ag+, Al3+ etc.
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Question # 22
Ozone is stratosphere is depleted by
Choose an answer
CF2Cl2
C7F16
C6H6Cl6
C6F6
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Question # 23
Which of the following is the major process when neopentyl bromide is dehydrogenate with alcoholic potash.
Choose an answer
2- methyl -1- butene
2- methyl- 1- butene
2,3 -dimethyl butene
2- butene
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Question # 24
Which of the following pollutant result from combustion of fossil fuels.
Choose an answer
SO2
NOx
CO
All above
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Question # 25
In the Mendeleev's periodic table elements are arranged in the increasing order of their .
Choose an answer
Numbers of neutrone.
Atomic number
Atomic mass
Atomic volume
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Question # 26
Electronegativity is given by
Choose an answer
Average of first and second ionization energies.
Average of first and second electron affinites
Average of ionization energy and electron affinity
None of the above
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Question # 27
Pi bond is formed
Choose an answer
By the overlapping of atomic orbitals on internuclear axis
By transference of electrons
By sidewise overlapping to half filled p orbitals
By overlapping of s-orbitals with p orbitals
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Question # 28
Which of the following statement is false regarding lyphilic sols.
Choose an answer
The colloidal particles show a linking for the dispersion medium
These are generally easy to prepare
These are more stable than lyophobic sols
The stability of the sols is mainly due to the electrical double layer
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Question # 29
The compound (CH3)3COH according to IUPAC is known as.
Choose an answer
Tert Butanol
2,2 -Dumethyl -Propanol
2- Methyl -2-propanol
Tert Alcohol
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Question # 30
Which type of organic compounds does fat belong to.
Choose an answer
Alkene
Ester
Alkanol
Alkanoic acid
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Question # 31
Among oxides of nitrogen all are gases except.
Choose an answer
N2O5
N2O
NO
N2O3
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