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ECAT Chemistry Online Test MCQs With Answers
Question # 1
Choose an answer
s
p
d
f
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Question # 2
Macromolecules are
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organic molecules
High molecular mass molecules
Natural compounds
Rarely occurring molecules
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Question # 3
Group l-A elements react with water fastly than the reaction of group ll-A elements because
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l
A
elements are more soft then ll
A
l
A
elements are non-metals
l
A
elements have 1 electron in their outermost s-orbital and are strongly electropositive
l
A
elements make ionic bond
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Question # 4
What is not a common use of methane
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As a fuel
For the preparation of haloaklanes
For the preparation of methyl alcohol
For the preparation of sulphuric acid
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Question # 5
The number of electron that are paired in oxygen molecule are
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16
12
14
7
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Question # 6
If initial concentration of the reactants and half life period of the reaction is known, then we can determine
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Average rate of reaction
Order of reaction
Rate constant k
Instantaneous rate
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Question # 7
Sodium forms largely
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Normal oxides
Per-oxides
Superoxides
None of these
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Question # 8
Which of the following is a water soluble vetamin?
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Niacin
Riboflavin
Trypsin
Ascorbic acid
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Question # 9
In the presence of copper electrodes the electrolysis of aqueous CuSO
4
produces at cathode
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H
2
gas
O
2
gas
SO
2
gas
Cu metal
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Question # 10
The correct arrangement of increasing order of atomic radius among Na, K, Mg, Rb is
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Mg < K < Na < Rb
Mg < Na < K < Rb
Mg < Na < Rb < K
Na < K < Rb < Mg
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Question # 11
CO+ is an example of
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Stable molecule
Anionic molecule ion
Cationic molecular ion
Free radical
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Question # 12
The wave number of light emitted by a certain source is 2 x 10
5
m. The wavelength of this light will be:
Choose an answer
500 NM.
500 M.
200 NM.
5 x 10
7
m
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Question # 13
In t-butyl alcohol, the tertiary carbon is bonded to:
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Two hydrogen atom
Three hydrogen atoms
One hydrogen atoms
No hydrogen atoms
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Question # 14
Acid rains are produced by
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Excess NO
2
and SO
2
from burining fossil fuels
Excess production of NH
3
by industry and coal gas
Excess release of carbon monoxide by incomplete combustion
Excess formation of CO
2
by combustion and animal respiration
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Question # 15
Coordination number of Pt in [PtCI(NO
2
) (NH
3
)
4
]
2+
is
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2-
4
1
6
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Question # 16
A polymer may be
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Linear
Branched
Cross linked
All of these
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Question # 17
Calcium acetate when dry distilled gives
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Formaldehyde
Acetaldehyde
Acetone
Acetic anhydride
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Question # 18
The ore CaSO
4
2H
2
O has the general name
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Gypsum
Dolomite
Calcite
Epsom salt
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Question # 19
NaBH
4
and LialH
4
are
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Ionic hydrides
Covalent hydrides
Interposal hydrides
Complex hydrides
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Question # 20
What is the volume in cm
3
of 3.01 x 10
23
molecules of O
2
gas at S.T.P
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1000 cm
3
11000 cm
3
1120 cm
3
11200 cm
3
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Question # 21
Photons of yellow colour are ______ energetic than violet colour
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More
Less
Equal
None
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Question # 22
Basicity of orthoposphoric acid is
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2
3
4
5
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Question # 23
When aqueous solution of NaOH is electrolysed useing graphite electrodes, the product obtained at anode is
Choose an answer
O
2
gas
H
2
gas
Na metal
Na
2
O
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Question # 24
Which represents nucleophilic aromatic substitution reaction?
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Reaction of benzene with Cl
2
in sunlight
Benzyl bromide hydrolysis with water
Reaction of NaOH with dintrofluoro benzene
Sulphonation of benzene
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Question # 25
In its reaction with Na, 1 mol of X gives 1 mol of H
2(g)
. What is X
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CH
3
CH
2
CH
2
CH
2
OH
(CH
3
)
3
COH
CH
3
CH
2
CH
2
CO
2
H
CH
3
CH(OH)CO
2
H
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Question # 26
Hydrogenation of bezoyl chloride in presence of Pd on BaSO
4
gives
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Benzyl alcohol
Benzaldehyde
Benzoic acid
Phenol
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Question # 27
Which one of the following statements of glucose and sucrose is incorrect?
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Both are soluble in water
Both are naturally occuring
Both are carbohydrates
Both are disaccharides
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Question # 28
Enzymes, in the living systems
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Provide energy
Provide immunity
Transport oxygen
Catalyze biochemical processes
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Question # 29
10g Of NaOH Has Been Dissolved Per
dm
3
of solution. The morality of solution is :
Choose an answer
0.025 M
1.5 M
0.1 M
.25 M
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Question # 30
Light emitted from a source has its wave length 500nm, then its wave number will be
Choose an answer
2 x 10
6
m
-1
2 x 10
7
m
-1
5 x 10
8
m
-1
5 x 10
9
m
-1
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Question # 31
Ecosystem is a smaller unit of
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Hydrosphere
Lithosphere
Biosphere
Atmosphere
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