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ECAT Chemistry Online Test MCQs With Answers
Question # 1
Calcium acetate when dry distilled gives
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Formaldehyde
Acetaldehyde
Acetone
Acetic anhydride
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Question # 2
The IUPAC name fo CH
3
COCH (CH
3
)
2
is
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4-Methylisopropyl ketone
3-Methyl-2 butanone
Isopropylmethyl ketone
2 - Methyl- 2 butanone
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Question # 3
Product of concentration of ions raised to the power equal to the co-efficient of ions in balanced equation for saturated solution of a salt is called
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Ionic product
Equilibrium constant K
c
K
w
Solubility product (K
sp
)
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Question # 4
Which substances have
Δ
H =
Δ
E
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Solids
Liquids
Gases
Liquids and solids
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Question # 5
The major components of coal gas are
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Hydrogen and methane
Ethane and carbon monoxide
Nitrogen and ethane
Ethane and carbon dioxide
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Question # 6
How is the secondary structure of protein stabilized
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Through hydrogen bonding
Through ionic bonding
Through van der wall forces
Through covalent bonding
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Question # 7
The method in which alkanes prepared by alkyle halides in the presence of palladium - charcoal is
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Hydrolysis
Electrolysis
Hydrogenation
Hydrogenolysis
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Question # 8
SN2 reaction can be best carried out with
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Primary alkyl halides
Secondary alkyl halides
Tertiary alkyl halides
All the three
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Question # 9
De halogenatiion of tetrahalides happens in the presence of active metal like
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Zn
Mg
Both a and b
None of them
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Question # 10
Each vertical column of the periodic table includes elements with chemical characteristics that are in general
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Identical
Similar
Different
Similar as well as different
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Question # 11
An organic acdi having molecular formula C
2
H
4
O
2
is
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Formic acid
Acetic acid
Oxalic acid
Propionic acid
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Question # 12
Sodium forms largely
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Normal oxides
Per-oxides
Superoxides
None of these
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Question # 13
If 5.85 of NaCI are dissolved in 90g of water the mole fraction of NaCI is
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0.1
0.01
0.2
0.0196
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Question # 14
Zeotropic mixture
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Obey Henry's law
Obey Raoult's law
Does not obey Raoult's law
Obey Dalton's law
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Question # 15
Bell metal is an alloy of Sn and
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Copper
Iron
Zinc
Magnesium
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Question # 16
Benzene has a -------- structure
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Pentagonal
Hexagonal
Heptagonal
Tetragonal
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Question # 17
In incinerating the waste is burnt at
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1000°C
100°C
2000°C
1500°C
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Question # 18
If a reactant or product of a reaction absorbs radiation, then physical method for determining the rate of reaction is
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Spectrometry
Refractometry
Conductivity measurement
Optical method
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Question # 19
Which of the following fibres are made of polyamides?
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Dacron
Orlon
Nylon
Rayon
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Question # 20
The rate of reaction :
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Decreases as the reaction proceeds
Increases as the reaction proceeds
May decrease or increase reaction proceeds
Remains same as the reaction proceeds
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Question # 21
The electronic configuration of an atom/ion can be defined by the following
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Aufbau principle
Pauli's exclusion principle
Hund's Rule
All the above
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Question # 22
The organic compounds containing Ph-OH group are called:
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Phenol
aldehyde
Keton
Carboxylic acids
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Question # 23
Derivative of water is:
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Alcohals
Phenols
Either
Phenol
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Question # 24
HCOOH reacts with conc. H
2
SO
4
to produce
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CO
CO
2
NO
NO
2
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Question # 25
Which of the following statements about acetic, anhydride is not correct
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It is immiscible with water but is hydrolysed to give acetic acid
It is prepared by the action of actyl chloride on the sodium salt of acetic acid
it reacts with ammonia to give acetamide
it is a strong acid
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Question # 26
In an ooctahedral crystal field splitting, the number of orbitals pushed down in energy is
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3
2
5
Zero
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Question # 27
Two H-atom combine to form a strong H
2
molecule due to
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Increase in potential energy
Decrease in potential energy
Energy remains unchanged
Distance is increased
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Question # 28
From left to right, atomic radii of transition elements
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Increases
Decreases
Remain same
None of the above
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Question # 29
An element of the third period (Na to S) is heated in chlorine. The product is purified and then added to water. The resulting solution is found to be neutral. What is the element
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Sodium
Aluminium
Silicon
Phosphorus
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Question # 30
[Cu[NH
3
)
4
]
+2
will form ______ structure
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Square planar
Tetrahedral
Octahedral
Trigonal bipyramidal
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Question # 31
Which of the following is not isoelectronic?
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Na
+
Mg
2+
O
2-
Cl
-
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