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ECAT Chemistry Online Test MCQs With Answers
Question # 1
Choose an answer
A strong reducing agent
A strong oxidising agent
Better oxidising agent than hydrogen
Less reducing agent than hydrogen
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Question # 2
A suitable solvent should dissolve maximum amount of solute at its boiling point and minimum amount at :
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Freezing point.
Room temperature.
Boiling point.
Sea level temperature.
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Question # 3
A single chlorine free radical can destroy how many ozone molecules
Choose an answer
100
100000
10000
10
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Question # 4
How many secondary alcoholic groups are present in the structure of glucose OHC CHOH CHOHCH OH CHOH CH
2
OH
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1
2
3
4
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Question # 5
With amino acids ninhydrin solution gives
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Blue
Violet
Bluish violet
White
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Question # 6
The reference electrode is made by using
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ZnCl
2
CuSO
4
HgCl
2
Hg
2
Cl
2
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Question # 7
Δ
H is equal to
Choose an answer
E + PV
E + P
Δ
V
Δ
E + P
Δ
E + P
Δ
V
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Question # 8
According to Lewis concept ethers behave as:
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Acid
Base
Acid as well as a base
None of them
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Question # 9
Silver oxide battery has a voltage of
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2.0 V
1.5 V
2.5 V
1.0 V
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Question # 10
The electrolysis of CuSO
4
aqueous solution using copper as cathode as well an anode the substance which deposits at cathode is
Choose an answer
H
2
SO
4
Oxygen
Copper
Hydrogen
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Question # 11
A chemical reaction is in equilibrium when
Choose an answer
Formation of product is minimum
Reactants are completely transformed into products
Rates of forward and backward reactions are equal
Equal amounts of reactants and products are present
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Question # 12
A ring contains 3 gram diamond. The number of C-atoms which a ring contains is
Choose an answer
3.01 x 10
23
1.5 x 10
23
6.02 x 10
24
3.01 x 10
24
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Question # 13
The reaction is galvanic cell is
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Spontaneous
Non-spontaneous
Acid-base
None of these
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Question # 14
The most suitable method of the separation of a mixture of ortho and para-nitrophenol mixed in the ratio of 1: 1 is
Choose an answer
Distrillation
Crystallization
Vapourisation
Colour spectrum
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Question # 15
The relation between Kc and Kp is
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Question # 16
Which of the following will have the highest boiling point?
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Methanal
Ethanal
Propanal
2-Hexanone
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Question # 17
When an alcohol reacts with SOCI
2
an alkyl halide is formed. What are two other products
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SO
2
and HCI
SI
2
and H
2
O
HCI and H
2
O
H
2
S and HCI
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Question # 18
When primary amine reacts with chloroform in ethanolic KOH, then the product is
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An isocyanide
An aldehyde
A cyanide
An alcohol
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Question # 19
Which one of the following properties is not correct for ozone?
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It oxidizes lead sulphides
It oxidizes potassium iodide
It oxidizes mercury
It cannot act as a bleaching agent
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Question # 20
Substitution of halogen in the benzene ring requires catalyst
Choose an answer
AlCl
3
FeCl
3
SiO
2
Organo - nickel
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Question # 21
The change in concentration of reactant or product per unit time is called :
Choose an answer
Rate constant.
Rate of reaction.
Rate equation.
Rate law.
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Question # 22
The elements with atomic numbers 9, 17, 35, 53, 85 an all
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Noble gases
Halogens
Heavy metals
Light metals
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Question # 23
Which of the following is not true for metalloids
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They are borderline elements that exhibit both metallic and non-metallic properties to some extent
They usually act as electron donors with non-metals and as electron acceptors with metals
Some of these elements are boron, silicon and germanium
They are good conductors of heat and electricity
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Question # 24
One mole of ethanol and one mole of ethane have an equal
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Mass
Number of atoms
Number of electrons
Number of molecules
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Question # 25
Ascorbic acid contains 40.92% carbon, 4.58%, hydrogen and 54.4% oxygen. The empirical formula is
Choose an answer
C
3
H
4
O
3
C
2
H
4
O
3
C
3
H
5
O
4
C
2
H
3
O
1
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Question # 26
A pollutant affects
Choose an answer
Human health
Quality of life
Functioning of ecosystem
All of these
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Question # 27
The number of neutrons in the element
9
4
Be is
Choose an answer
4
5
9
13
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Question # 28
Weakest acid among the followings is
Choose an answer
Acetic acid
Phenol
Water
Acetylene
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Question # 29
Chlorobenzene on heating with aqueous NH
3
under pressure in the presence of cuprous chloride gives
Choose an answer
Benzamide
Nitrobenzene
Aniline
Chloroaminobenzene
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Question # 30
Lithium reacts with air to form
Choose an answer
Peroxide
Normal oxide
Superoxide
None of these
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Question # 31
The treatment of benzene with isobutene in the presence of sulphuric acid give
Choose an answer
isobutyl benzene
tert-Butyl benzene
n- Butyl benzene
no reaction
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