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Online Tests
Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
At what temperature, would N
2
molecules have the same average speed as He-molecules at 300 k?
Choose an answer
1100 K
2100 K
420 K
None
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Question # 2
The vapour pressure of a liquid depends upon
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amount of the liquid
surface area
temperature
size of container
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Question # 3
which one of the following statements bout negative ions is incorrect?
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they are also know as anions
they are formed when atoms gain electrons
they are large than the atom from which they were formed
they are smaller than the atom from which they were formed
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Question # 4
The respiration process taking place in animals depends on a difference in
Choose an answer
Partial pressure
Osomotic pressure
Vapour pressure
Atomospheric pressure
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Question # 5
Chemicals used to kill insects are:
Choose an answer
Herbicides
Insecticides
Pesticides
Fungicides
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Question # 6
A crystal system in which the unit cell has different all cell lengths but all angles equal to 90
° it is called as
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orthorhombic
triclinic
monoclinic
cubic
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Question # 7
Which of the following gas will have lowest rate of diffusion
Choose an answer
CH
4
N
2
NH
3
CO
2
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Question # 8
The compound that has zero dipole moment is
Choose an answer
HCl
H
2
S
NH
3
CH
4
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Question # 9
Optimum temperature for enzyme activity is
Choose an answer
125°C
37°C
40°C
100°C
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Question # 10
Acetic acid is obtained from:
Choose an answer
Red out
Vinegar
Butter
Milk
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Question # 11
Which of the following are responsible for the colour developed in transition elements compounds?
Choose an answer
s-orbitals
p-orbitals
d-orbitals
f-orbitals
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Question # 12
Which of the following has the maximum number of unpaired d-electrons?
Choose an answer
Zn
Fe
2+
Ni
3+
Cu
+
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Question # 13
When the electron jumps form second third, fourth orbit to the fist orbit, the transitions are known as
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Balmer series
Lyman series
Pfund series
Brackett series
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Question # 14
Coordination number of Pt in [Pt Cl(NO
2
) (NH
3
)]
2-
is
Choose an answer
2-
4
1
6
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Question # 15
A limiting reactant is one which according to the stoichiometric equation
Choose an answer
Has excess mass
Has least mass
Has excess number of moles
Has least number of moles
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Question # 16
The art of electroplating was given by
Choose an answer
Faraday
Edison
Thomas Gradam
Brugan
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Question # 17
In public urinals, we observe some nascent smell. This smell is due to
Choose an answer
Hydrolysis of urea of urine by urease of atmosphere into NH
3
and CO
2
Formation of sulphonic acid by urea of urine
Reaction of CO
2
of atmosphere with urea monoitrate in urine
Hydrogen present in air reacts with nitrogen forming NH
3
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Question # 18
The elimination of hydrogen halide from adjacent carbon atoms is called
Choose an answer
Dehydrogenation
Hydrogenation
Dehydrohalogenation
Hydrohalogenation
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Question # 19
A solution containing 5.8 grams acetone (CH
3
OCH
3
), 4.6 gram ethyl alcohol (C
2
H
5
OH) and 12 grams chloroform (CHl
3
) has mole fraction and mole percent of acetone
Choose an answer
0.11, 10%
0.33, 33%
0.22, 22%
0.11, 33%
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Question # 20
Ascorbic acid contains 40.92% carbon, 4.58%, hydrogen and 54.4% oxygen. The empirical formula is
Choose an answer
C
3
H
4
O
3
C
2
H
4
O
3
C
3
H
5
O
4
C
2
H
3
O
1
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Question # 21
Which is not a calcarious material?
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Lime
Clay
Marble
Marine shell
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Question # 22
Which species represented by the following formula has the largest radius
Choose an answer
P
3-
Cl
-
A
r
K
+
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