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ECAT Chemistry Online Test MCQs With Answers
Question # 1
The molarity of the solution containing x grams (NH
4
)
2
SO
4
in 500 cm
3
of the solution is 0.6 what is x
Choose an answer
39.6
45.1
40.5
42.7
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Question # 2
Most metals are conductors of electricity because of the :
Choose an answer
Light weight.
Immobility of the electrons.
Lustrous surfaces
Relatively free movement of their electrons
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Question # 3
Alkynes are colourless & odouless except
Choose an answer
Acetylene
Propyne
Butyne
Pentyne
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Question # 4
B.O.D is connected with
Choose an answer
Organic matter
Microbes
Mircrobes and organic matter
None of the above
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Question # 5
Water which his considered to be safe for human consumption is known as
Choose an answer
Distilled water
Contaminated water
Potable water
Rain water
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Question # 6
The empirical formula of a liquid compound is known to be C
2
H
4
O. What other information is needed to work out its molecular formula?
Choose an answer
The percentage composition of the compound
The relative molecular mass of the compound
The density of the compound
The volume occupied by one mole of the compound
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Question # 7
Ammonium nitrate fertilizer is not used for which crop
Choose an answer
Cotton
Wheat
Sugar cane
Paddy rice
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Question # 8
Oxidation reduction is done by
Choose an answer
Oxidoreductase
Lipases
Lyase
None of these
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Question # 9
From
39
Y to
48
Cd are called
Choose an answer
Transition elements
Outer transition elements
Inner transition elements
2nd transition series
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Question # 10
Maximum potential energy that an electron can have within the atom is:
Choose an answer
Equal to zero.
Less than zero.
Greater than zero.
Infinite
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Question # 11
A solution of glucose is of methanol in water has vapor pressure :
Choose an answer
Equal that of water.
Equal to that of methanol.
More than that of water.
Less than that f water.
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Question # 12
Solution which distill without change in composition or temperature are called
Choose an answer
Amorphous
Azeotropic mixture
Ideal
Super saturated
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Question # 13
A carboxylic acid with one caboxyl group:
Choose an answer
Monocarboxylic acid
Dicarboxylic acid
Tricarboxylic acid
Polycarboxylic acid
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Question # 14
The entropy of the universe
Choose an answer
Constant
Is equal to zero
Decreasing
Increasing
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Question # 15
Which of the following is not fatty acid?
Choose an answer
Propanoic acid
Acetic acid
Phthalic acid
Butanoic acid
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Question # 16
For spontaneity of a cell, which is correct?
Choose an answer
Δ
G = 0,
Δ
E = 0
Δ
G = -ve ,
Δ
E = 0
Δ
G = +ve ,
Δ
E = 0
Δ
G = -ve
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Question # 17
Heat,. work and internal energy of the system and surroundings are related into an equation which is called
Choose an answer
First law of thermodynamics
Hess's law
Henry's law
Born-haber cycle
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Question # 18
Which of the following has polar bond
Choose an answer
O
2
N
2
HCl
Cl
2
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Question # 19
The chemist who synthesized urea form ammonia cyanate was:
Choose an answer
Berzelius
Kolbe
Wohler
Lavoiser
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Question # 20
Ozone hole refers to
Choose an answer
Hole in ozone layers
Reduction in thickness of ozone layer in stratosphere
Reduction of thickness of ozone in troposphere
Increase concentration of ozone
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Question # 21
When electricity is passed through molten electrolyte consisting of alumina and cryolite, 13.5 g of Al are deposited. The number of faradays of electricity passed must be
Choose an answer
2.0
1.5
1.0
0.5
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Question # 22
Which bond shows maximum hydrogen bonding with water?
Choose an answer
CH
3
OH
C
2
H
5
OH
CH
3
----O----CH
3
C
6
H
5
OH
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Question # 23
The divisibility of atom was shown by
Choose an answer
Stoney
J.J. Thomson
Millikan
Rutherford
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Question # 24
Each molecule of haemoglobin is 68000 times heavier than one atom of
Choose an answer
C
H
N
O
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Question # 25
Cannizzaro's reaction in not given by
Choose an answer
Formaldehyde
Acetaldehyde
Benzaldyhyde
Trimethylacetaldehyde
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Question # 26
Number of
isomers of butane are:
Choose an answer
One
Two
Three
Four
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Question # 27
A solution sucrose is 34.2%. The volume of solution containing one mole of solute :
Choose an answer
342
cm
3
1000
cm
3
500
cm
3
242
cm
3
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Question # 28
Ethylene can be prepared in the laboratory by heating together ethyl alcohol and
Choose an answer
HCI
Phenol
HF
H
2
SO
4
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Question # 29
Concentration of rectified spirit is:
Choose an answer
12%
14%
90%
95%
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Question # 30
Choose an answer
Reversible reaction
Irreversible reaction
Spontaneous reaction
None of these
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Question # 31
The size of electronic shell is described by
Choose an answer
Azimuthal Q. no
Magnetic Q.No
Spin Q. No
Principle Q. No
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