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Chemistry General Science Test Hard Mode MCQs With Answers
Question # 1
Octane number is zero for
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n-Heptane
Isooctane
n-Hexane
Isoheptane
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Question # 2
ΔH
Neutralisation
is always
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Positive
Negative
Zero
Positive or negative
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Question # 3
Natural fertilizer provides potassium in the form of K
2
O (potash)
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1.5 kg
3 kg
4.5 kg
6.5 kg
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Question # 4
Wholer prepared ures from
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Ammonia
NH
4
CNO
NH
3
uric acid
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Question # 5
Which one is primary alcohol?
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Buten-2-oI
Propan-2-oI
Butane-1-oI
2,3-Dimethylhexane-4-oI
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Question # 6
2 g oxygen contains number of atoms equal to that in
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0.5 g of hydrogen
4 g of sulphur
7 g of nitrogen
2.3 g of sodium
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Question # 7
The number of atoms in 0.0004 g of magnesium is close to
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24
2 x 10
20
10
20
6.02 x 10
23
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Question # 8
The order of reactivity of halogens in aliphatic substitution reactions is
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Br2 > CI2 > F2
CI2 > Br2 > F2
CI2 CI2 > Br2
F2 > Br2 > CI2
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Question # 9
Gooch crucible used to filter the solution of
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H
2
SO
4
HCI
KMnO
4
Both B & C
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Question # 10
Tollen's reagent is
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Ammonical cuprous chloride
Ammonical cuprous oxide
Ammonical silver bromide
Ammonical silver nitrate
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Question # 11
The freezing point of 1 molal NaCI solution assuming NaCI to be 100% dissociated in water in
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-1.86°C
-3.72°C
+1.86°C
+3.72°C
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Question # 12
Among the alkaline earth metals the element forming predominantly covalent compounds is
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Be
Mg
Sr
Calcium
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Question # 13
Bell metal is an alloy of
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Cu, Zn and Sn
Cu, Zn and Ni
Cu and Zn
Cu and Sn
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Question # 14
Chile salt petre is
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NaNO
3
Na
2
SO4
KNO
3
Na
2
S
2
O
3
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Question # 15
The halide which is not hydrolysed is
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SiCl
4
SiF
4
CCl
4
PbCl
4
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Question # 16
Chief air pollutant which is likely to deplete ozone layer
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Suphure dioxide
Carbon dioxide
Carbon dioxide
Nitrogen oxides and chloro flrorocarbons
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Question # 17
The number of unpaired electrons in the p-subshell of oxygen atom
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1
2
3
4
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Question # 18
The rate of a reaction that does not involves gases, does not depend upon
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Pressure
Temperature
Concentration
Catalyst
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Question # 19
Vital force theory was rejected by
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Berzelius
Kolbe
Wholer
Lavoiser
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Question # 20
Galena is an ore of
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Gallium
Lead
Tin
Germanium
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Question # 21
Wt. of 112 ml of oxygen at NTP on liquification would be
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0.32 g
0.64 g
0.16 g
0.96 g
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Question # 22
Which of the following does not reflect the periodicity of elements?
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Bonding begaviour
Electronegativity
Ionisation potential
Neutron/proton ratio
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