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ECAT Chemistry Online Test MCQs With Answers
Question # 1
An electrochemical cell is based upon
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Acid-base reaction
Redox reaction
Nuclear reaction
None of the above
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Question # 2
Atomic number of Al is 13. When it forms ionic bond with oxygen the number of electrons lost by 1 Al atom is
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1
2
3
4
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Question # 3
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84.84 %
89.89%
81.81%
90.90%
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Question # 4
Any substance under going physical or chemical change is said to be
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Surrounding
System
Losphere
Lithosphere
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Question # 5
Which one of the following mixture shows positive deviation form Rault's law and forms an azetrope with minimum boiling point
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Methanol + CCI
4
Methanol + acetone
Ether + HCI
Acetone + chloroform
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Question # 6
Which heavy metals do not have any safe limits
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As
Hg
Cr
All of these
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Question # 7
The high molecular weight materials which yield on hydrolysis the amino acids is called:
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Carbohydrates
Lipids
Fatty acids
Proteins
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Question # 8
Synthesis rubber is made by polymerization :
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Chloroform
Acetylene
Divinyl acetylene
Butene
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Question # 9
Phenol is heated with CCl
4
and alkaline KOH when salicylic acid is produced.The reaction is known as
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Frledel-Craft reaction
Riemer-Tiemann's reaction
Rosenmund's reaction
Sommelet reaction
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Question # 10
Which one is primary alcohol?
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Buten-2-ol
Propan-2-ol
Butaon-1-ol
2,3-Dimethylhexane-4-ol
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Question # 11
The colour of the transition metal compounds is due to
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p-d transition
d-d transition
s-p transition
None of these
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Question # 12
Corrosion reaction are
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Spontaneous redox reaction
Non-spontaneous acid-base reactions
Spontaneous acid-base reactions
None of these
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Question # 13
Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water
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SO
2
NO
2
CO
A and b only
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Question # 14
Camphor is often used in molecular mass determination because
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It is solvent for organic substances
It is readily available
It has a very high cryoscopic constant
It is volatile
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Question # 15
Ethylene polymerizes at 100 atm pressure and 400°C to give
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Polybenzene
Polyalcohol
Polypropylene
Polyethylene
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Question # 16
Grignard's reagent on treatment with carbonyl compounds yield
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Pheonol
Alcohol
Alkane
None of these
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Question # 17
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First order
Pseudo first order
Second order
Zero order
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Question # 18
NaHCO
3
is prepared by
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Down's process
Solvay's process
Nelson's process
None of these
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Question # 19
The reaction of 4-bromobenzyl chloride with NaCN in ethanol leads to
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4-Bromobenzyl cyanide
4-Cyanobenzyl chloride
4-Cyanobenzyle cyanide
4-Bromo 2-cyanobenzyl chloride
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Question # 20
Hypo is used in photography for
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Developing picture
Picture printed
The colour of picture
The fixation of picture
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Question # 21
Which gasses are produced from landfills
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NH
3
H
2
S
N
2
All of these
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Question # 22
Sodium is manufacture by the electrolysis of fused sodium chloride and not from an aqueous solution of sodium chloride because
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Sodium chloride does not ionize in the water solution
Sodium chloride is not soluble in water
Sodium deposited at the cathode may react with water to form sodium hydroxide
Electricity does not pass through aqueous NaCl
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Question # 23
The chemist who synthesized urea from ammonium cyanate was
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Berzelius
Kolbe
Wholer
Lavoisier
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Question # 24
Benzene is obtained from benzene sulphonic acid by treating with
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HCl
NaOH
H
2
O
NaHCO
3
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Question # 25
During electrolysis, electrons are :
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Lost by anions and gained by cations
Gained by anions and lost by cations
Gained only
Lost only
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Question # 26
Selection of filter paper depends upon sizes of particles to be:
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Tested
Filtered
Checked
All of above
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Question # 27
Most common oxidation states shownby cerium are
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+2, +4
+3, +4
+3, +5
+2, +3
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Question # 28
Which of the following is not an element?
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Graphite
Diamond
22-Carat gold
Rhombic sulphur
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Question # 29
Which of the following is the use of electrolysis?
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Eletrorefining
Electroplating
Both A and B
None of the above
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Question # 30
When initial concentration of reactants an order of reaction is given, then its half life period can be calculated by the equation
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Question # 31
In which one of the following compound rings are not fused together at ortho positions
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Phenanthrene
Naphthalene
Diphenyemethane
Anthracene
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