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ECAT Chemistry Online Test MCQs With Answers
Question # 1
The energy of the system and surrounding is conserved. This is a statement of
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Law of mass action
Law of definite proportion
Law of conservation of energy
Second law of thermodynamics
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Question # 2
Lead accumulator contains
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30% NaCI solution as electrolyte
30% HCI solution as electrolyte
30% H
2
SO
4
solution as electrolyte
30% NaOH solution as electrolyte
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Question # 3
Alkenes combine readily with electrophillic reagents such as halogens giving
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Haloalkanes
Gem-dihalides
Vicinal dihalides
Vinyl halides
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Question # 4
Which of the following compounds is explosive in nature?
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Phosphorus trichloride
Nitrogen trichloride
Hyponitrous acid
Nitrosyl chloride
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Question # 5
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 # 6
The spectrum of helium is expected to be similar to that of
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H
Li
+
Na
He
+
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Question # 7
Vegetables oils are:
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Unsaturated fatty acids
Glycerides of unsaturated fatty acids
Essential oils obtained form plants
None of these
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Question # 8
Which of the following is present in the stings of bees and wasps
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Formic acid
Citric acid
Carbolic acid
Formalin
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Question # 9
A solution of two component is called
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Binary solution
Dilute solution
Original solution
Standard solution
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Question # 10
The order of reactivity of halogen acids for reaction with C
2
H
5
OH is
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HCl > HBr > HI
HI > HBr > HCl
HBr > HI > HCl
HBr > HCl > HI
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Question # 11
What is the total number of different chloroethanes, formula C
2
H
6-n
Cl
n
, where n can be any integer from 1 to 4
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4
6
7
8
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Question # 12
The quantum number which describes the shape of the orbital is
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Principle quantum number
Spin quantum number
Azimathal quantum number
Magnetic quantum number
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Question # 13
What is formed when oxalic acid is dehydrated by conc. H
2
SO
4
?
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C + CO
2
CO
CO
2
CO + CO
2
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Question # 14
The reaction between primary amine-chloroform and alcoholic caustic potash is called
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Wurtz reaction
Frankland reaction
Cannizzaro's reaction
Carbylamine reaction
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Question # 15
The electrode through which the electrons enter the electrolytic solution is electrolytic solution is
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Anode
Cathode
May be anode or cathode
None of these
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Question # 16
______ are called biocatalysts
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Organic acids
Organic bases
Enzymes
All
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Question # 17
When hydrogen cyanide is added to an Aldehyde in the presence of ammonia it is called
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Strecker synthesis
Cory house synthesis
Williamson;s synthesis
None of these
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Question # 18
The ratio of moles of a particular component of solution to total moles of all components of solution is :
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Mole fraction.
Molality.
Molarity.
Normality.
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Question # 19
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The heat released is enthalpy of neutralization
The heat released is enthalpy of atomization
The heat released is enthalpy of sublimation
The heat released is enthalpy of formation
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Question # 20
Ascorbic acid is a chemical name of
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Vitamin D
Vitamin A
Vitamin C
Vitamin B
6
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Question # 21
Which of the following salts mixed with ice to make the freezing mixture used in ice cream machine
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KNO
3
NH
4
NO
3
AgNO
3
Mg(NO
3
)
2
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Question # 22
In the atomic emission spectrum the lines which appear bright, appear dark in absorption spectrum because
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The radiations emitted in emission spectrum are absorbed in absorption spectrum
Atomic emission spectrum is continuous
Atomic absorption spectrum is continuous
Distance between the lines increases
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Question # 23
The compound which gives oxygen on moderate heating is
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Zinc oxide
Mercuric oxide
Aluminium oxide
Ferric oxide
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Question # 24
Which of the following half molar solutions will have lowest freezing point
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Solution of non-volatile, none electrolyte
Solution of non volatile, weak electrolyte
Solution of non volatile strong electrolyte
Solution of volatile, non electrolyte
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Question # 25
In KO
2
the oxidation state of oxygen is
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-2
-1
+1/2
-1/2
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Question # 26
Strong oxidizing agents have
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Greater positive value of standard reduction potential
Lesser positive value of standard
Greater negative value of standard
None of these
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Question # 27
Vital force theory was rejected by
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Berzellius
Kolbe
Wholer
Lavoiser
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Question # 28
Which of the following is not related to transition metals
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They have a high tensile strength
They are ductile
They are malleable
They have low melting points
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Question # 29
Which of the following is used as anesthetics
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Alcohol
Diethylether
Phenol
Dimethyl ether
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Question # 30
Which of the following is obtained by condensation polymerization?
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Polyethene
Teflon
Phenol formaldehyde resin
Nitrile rubber
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Question # 31
The amino acids which human body can synthesize are called ______ amino acid
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Essential
Non essential
Acidic
Basic
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