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ECAT Chemistry Online Test MCQs With Answers
Question # 1
The measurement of degree of disorder is
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Internal energy
Enthalpy
Entropy
None
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Question # 2
The process in which the solvent molecules are surrounded and interact with solute ions or molecules is called
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Solvation
Hydration
Hydrogenation
None
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Question # 3
DDT is formed from
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Benzene and Chlorobenzene
Chloral and Chlorobenzene
Chloral and Benzene
Chlorobenzene and chlorine
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Question # 4
Orbitals having same energy are called
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Hybrid orbitals
Valence orbitals
Degenerate orbitals
D-orbitals
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Question # 5
When aqueous NaCl is electrolyzed, which of the following ions get discharged at anode :
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H
+
Na
+
OH
-
Cl
-
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Question # 6
In Antarctica ozone depletion is due to the formation of following compound
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Acrolein
Peroxy acetyl nitrate
SO
2
and SO
3
Chlorine nitrate
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Question # 7
The organic compounds which derivative of hydrocarbons due to oxygen is:
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Phenol
Alcohol
Alkyl halide
Either
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Question # 8
Which among the following elements have lowest value of IE
1
?
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Pb
Sn
Si
C
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Question # 9
The solution of which acid is used for seasoning of food
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Formic acid
Acetic acid
Benzoic acid
Butanoic acid
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Question # 10
Methyl alcohol is not used
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As a solvent
A an anti-freezing agent
As a substitute for petrol
For denaturing of ethyl alcohol
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Question # 11
All the following decompose easily on heating to give oxygen except
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Lead nitrate
Potassium chlorate
Mercuric oxide
Manganese dioxide
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Question # 12
Kolb's method has limited synthetic applications due to
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Expensive catalysis
Slow reaction
Number of side products produced
Salts used are very expensive
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Question # 13
Which step is unnecessary for purification of water for drinking purposes
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Aeration
Coagulation
Treatment with chlorine
Treatment with iodine
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Question # 14
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Total pressure
Amount of A
2
and B
2
Temperature
Catalyst
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Question # 15
Which is used to identify Cu
2+
ions
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Nitric acid
Sulfuric acid
NaOH
HCI
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Question # 16
The maximum number of electrons in the outermost shall of s-black elements is
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One
Two
Three
Four
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Question # 17
If 18 g glucose (C
6
H
12
C
6
) is present in 1000 g of an aqueous of glucose it is said to be
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1 molal
1.1 molal
0.5 molal
0.1 molal
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Question # 18
Enzymes, in the living systems
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Provide energy
Provide immunity
Transport oxygen
Catalyze biochemical processes
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Question # 19
Standard reduction of Zn = -0.76 V and that of Ni is -0.25 V. On coupling them by a salt bridge which of these will act as anode
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Salt bridge will act as anode
Zn will act as anode
Ni will act as anode
None of these
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Question # 20
Ethyl acetate is obtained when methyl magnesium iodide reacts with
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Ethyl formate
Ethyl choroformate
Acetyl chloride
carbondioxide
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Question # 21
The pH range of the acid rain is
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8 - 7
7 - 6.5
6.5 - 6
Less than 5
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Question # 22
Acetic acid is manufactured by the fermentation of
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Ethanol
Methanol
Ethanal
Methanal
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Question # 23
What will be the molarity of solution if 103 g (NH
4
)
2
SO
4
is dissolved per 600 cm
3
of water
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2.32 M
3.32 M
4.32 M
1.30 M
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Question # 24
A solution containing maximum amount of solute dissolved at a given temperature is called
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Saturated solution
Unsaturated solution
Supersaturated solution
Impure solution
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Question # 25
CsF is an ionic compound because:
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High I.P of Cs and high E.A of F.
High I.P of Cs and low E.A of F.
Low I.P of Cs and high E.A of F.
Low I.P of Cs and low E.A of F.
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Question # 26
Which of the following aqueous solutions have the lowest freezing point
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5.85% NaCI
6% urea
34.2 sucrose
All of them have same freezing points
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Question # 27
The organic compound, alcohols are much closer to, in structure and hence is also called its derivative:
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Water
Oxidizes of lithium oxides
Oxidizes of magnesium
Oxidizes of aluminium
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Question # 28
Which compound contains - OH in their molecule
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Alcohol
Phenol
Alcohol and phenol
Ether
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Question # 29
The compound prepared by a substitution reaction of benzene is
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Acetophenone
Glyoxal
Cyclohexame
Hexabromo cyclohexane
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Question # 30
Primary and secondary alcohols on action of red hot copper give
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Aldehydes and ketones respectilvely
ketones and aldehydes respectively
Only aldehydes
Only ketones
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Question # 31
The solution of which acid is use for seasoning of food?
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Formic acid
Acetic acid
Benzoin acid
Butanoic acid
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