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ECAT Chemistry Online Test MCQs With Answers
Question # 1
Choose an answer
RCH(CH
3
)CO
2
H + CH
3
OH
RCH(CH
3
)CO
2
H + HCO
2
H
RCH(CH
3
)OH + CO
2
RCH(CH
3
)OH + HCO
2
H
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Question # 2
The nitrogen present in some fertilizers helps plants
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To fight against disease
To produce fat
To undergo photosynthesis
To produce protein
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Question # 3
White phosphorus is
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A mono atomic gas
P
4
, a tetrahedral solid
P
8
, a crown
A linear diatomic molecule
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Question # 4
Orthophosphoric acid is
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Monobasic
Dibasic
Tribasic
Tetrabasic
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Question # 5
The measurement of degree of disorder is
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Internal energy
Enthalpy
Entropy
None
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Question # 6
Water shows maximum density at
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4°C
0°C
100°C
-4°C
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Question # 7
______ gives peroxide
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Li
Ba
Sr
Be
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Question # 8
Enzymes are
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Proteins
Minerals
Oils
Fatty acids
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Question # 9
Chromatography is derived from Greek word 'Khromatos' means:
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Type writting
Printing
Color writing
Writing
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Question # 10
A current of 9.65 ampere flowing for 10 minutes deposits 3.0 g of the metal which is monovalent. The atomic mass of the metal is
Choose an answer
10
50
30
96.5
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Question # 11
The wave number of the light emitted by a certain source is 2 x 10
6
m
-1
. The wavelength of this light will be
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500 nm
500 m
200 nm
5 x 10
7
m
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Question # 12
Which of the following is not a property of cathode rays
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They can produce x-rays when they strike a heavy metal anode
They can cause reduction reaction
They produce fluorescence in rare earth and minerals
They comprise neutral particles
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Question # 13
A solution of glucose is 10% The volume to which 1g mole of it dissolved will be :
Choose an answer
8.1 dm
3
1.7 dm
3
1.8 dm
3
6.1 dm
3
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Question # 14
Series starting form
39
Y to
48
CD is in period:
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4th
5th
6th
7th
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Question # 15
Which of the following will affect the rate :
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First step of reaction.
Last step of reaction.
Rate determining step.
Fastest step.
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Question # 16
Which of the following molecules has zero dipole moment>
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NH
3
CHCl
3
H
2
O
BF
3
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Question # 17
Which one is a polymer compound?
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SO
2
CO
2
CH
4
PVC
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Question # 18
Which of the following is the strongest acid?
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CF
3
COOH
CBr
3
COOH
CH
3
COOH
CCl
3
COOH
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Question # 19
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Question # 20
Reduction of alkyl halides give
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Alkanes
Alkenes
Ketones
Ether
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Question # 21
Each of the following is true of white and red phosphours except that they
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Are both soluble in CS
2
Can be oxidized by heating in air
Consist of the same kind of atoms
Can be converted into one another
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Question # 22
The radius of ion while considering it to be spherical in shape is called:
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Covalent radii.
Atomic radii.
Ionic radii.
Both (a) and (C).
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Question # 23
In CH
4
, all the H-C-H bond angles are
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120°
107°
109°
109.5°
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Question # 24
Alkaline earth metals posses two electrons in their outermost
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F-orbital
D-orbital
S-orbital
P-orbital
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Question # 25
The ionic bonds are
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Unidirectional
Bi-directional
Non-directional
Multi-directional
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Question # 26
Which of the following is a tetrabasic acid?
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ORthophosphoric acid
Hyposphosphorus acid
Metaphosphoric
Pyrophosphoric acid
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Question # 27
If
k
c
of a
reaction product
is very
large
, it indicates that
equilibrium occurs :
Choose an answer
With the help of a catalyst.
With no forward reaction.
At a low product concentration.
At a high product concentration.
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Question # 28
Ionization energies increase from left to right along the period due to
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Increase in nuclear charge
Repulsion of electron increases
Repulsion of protons increase
Atomic size increase along the period
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Question # 29
Acetamide is
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Highly acidic
Highly basic
Neutral
amphoteric
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Question # 30
The essential component of organic compound is
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O
C
P
N
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Question # 31
A reaction in which heat is given out is
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An endothermic reaction
An exothermic reaction
A thermochemical reaction
An energetic reaction
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