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Chemistry General Science Test Hard Mode MCQs With Answers
Question # 1
With increasing principle quantum number the energy difference between adjacent energy levels in H atom
Choose an answer
Decreases
Increases
Remains constant
Decreases for low value of Z and increases for higher value of Z.
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Question # 2
At 500 K the equilibrium constant for reaction cis-C
2
H
2
CI
2
trans-C
2
H
2
CI
2
is 0.6. At the same temperature the equilibrium constant for the reaction trans-C
2
H
2
CI
2
cis-
C
2
H
2
CI
2
will be
Choose an answer
0.60
1.67
0.66
2.6
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Question # 3
Which of the following cannot be produced by acidic dehydration of alcohols?
Choose an answer
Ethers
Aldehyde
Alkyl Hydrogen sulphate
Alkene
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Question # 4
A chemical reaction A B is said to be in equilibrium when
Choose an answer
Complete conversion of A to B has taken place
Conversion of A to B is only 50% complete
Only 10% conversion of A to B has taken place
The rate of transformation of A to B is just equal to rate of transformation of B to A in the system
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Question # 5
Which one of the following elements occurs free in nature?
Choose an answer
N
P
As
Sb
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Question # 6
In which of the following elements +1 oxidation state is more stable than +3
Choose an answer
B
AI
Ga
Ti
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Question # 7
Which has maximum protein content?
Choose an answer
Ground nut
Cow milk
Egg
Wheat
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Question # 8
When pressure is applied to the equilibrium system Ice Water Which of the following phenomenon will happen?
Choose an answer
More ice will be formed
Water will evaporate
More water will be formed
Equilibrium will not be formed
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Question # 9
The total number of protons in 10 g of calcium carbonate is (N
o
= 6.023 x 10
23
)
Choose an answer
1.5057 x 10
24
2.0478 x 10
24
3.0115 x 10
24
4.0956 x 10
24
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Question # 10
Atmosphere of big/metropolitan cities is polluted most by
Choose an answer
Automobile exhausts
Pesticide residue
Household waste
Radio-active fall out
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Question # 11
1-Chloropropane has two isomers It is an example of
Choose an answer
Chain isomerism
Position isomerism
Functional group isomerism
Metamerism
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Question # 12
DDT is formed from
Choose an answer
Benzene and Chlorobenzene
Chloral and Chlorobenzene
Chloral and benzene
Chlorobenzene and chlorine
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Question # 13
Which species represents the electrpohile in aromatic nitrotaion?
Choose an answer
NO
-
2
NO
+
2
NO2
NO
-
3
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Question # 14
Fluorine does not show positive oxidation states due to the absence of
Choose an answer
d-orbitals
s-orbitals
p-orbitals
None
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Question # 15
Dilute hydrochloric acid solution cannot be concentrated by boiling beyond
Choose an answer
11%
33%
44%
22%
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Question # 16
Which of the following has least mass?
Choose an answer
2 gram atom of nitrogen
3 x 10
23
atoms of C
1 mole of S
7.0 g of Ag.
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Question # 17
The ratio of the ionization energy of H and Be
3+
is
Choose an answer
1 : 1
1 : 3
1 : 9
1 : 16
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Question # 18
Which of the following as a molecular diseaes?
Choose an answer
Allergy
Cancer
German measles
Sickle cell anemia
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Question # 19
Which is true for an element R present in group 13 of the periodic table?
Choose an answer
It is a gas at room temperature
It has oxidation state of +4
It forms R
2
O
3
It forms RX
2
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Question # 20
The total number of protons in 10 g of calcium carbonate is (N
0
= 6.023 x 10
23
)
Choose an answer
1.5057 x 10
24
2.0478 x 10
24
3.0115 x 10
24
4.0956 x 10
24
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Question # 21
Ammonia gas used directly as a fertilizer is injected into the soil at a depth of about
Choose an answer
Two inches
Three inches
Five inches
Six inches
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Question # 22
White P when boiled with strong solution of caustic soda produces
Choose an answer
Phosphine
Posh acid
Phosphorous acid
None
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