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ECAT Chemistry Online Test MCQs With Answers
Question # 1
Choose an answer
Forward
Backward
Already in equilibrium
K
c
is never less
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Question # 2
In Dow's method, phenol can be made from
Choose an answer
Chlorobenzene
Benzene
Toluene
Benzene sulphonic acid
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Question # 3
Which of the following sulphates is not soluble in water
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Sodium sulphate
Potassium sulphate
Zinc sulphate
Barium sulphate
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Question # 4
Hydrocarbons contain
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C and S only
C and H only
C, H, and O only
C, H, O and N only
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Question # 5
Environmental pollution affects
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Biotic components
Plants only
Man only
Biotic and abiotic components of environment
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Question # 6
Which of the following fibres are made of polyamides?
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Dacron
Orlon
Nylon
Rayon
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Question # 7
Choose an answer
Three times
Six times
Nine times
Two times
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Question # 8
Tetraethyle lead causes disease:
Choose an answer
Typhoid
Respiratory
Stomach
Muscular
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Question # 9
Grignard's reagent on treatment with dry CO
2
and HCI yields
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Ester
Alcohol
Carboxylic acid
Aldehyde
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Question # 10
Which compound is both chiral and acidic
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Question # 11
The rotation of two carbon atoms joined by double bond would happened only if
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Pi bond is broken
Sigma bond is broken
Both bonds are broken
None of above
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Question # 12
A complete chemical characterization of a compound must include
Choose an answer
Qualitative analysis
Chemical analysis
Quantitative analysis
Both a and c
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Question # 13
Which of the following d-block elements can show the highest oxidation number in its compounds
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Chromium
Copper
Nickel
Manganese
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Question # 14
If acetyl chloride is reducing in the presence of BaSO
4
and Pd, then
Choose an answer
CH
3
CHO is formed
CH
3
CH
2
OH is formed
CH
3
COOH is formed
CH
3
COCH
3
is formed
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Question # 15
Two different hydrocarbon each contain the same percentage by mass of hydrogen. It follows that they have the same
Choose an answer
Empirical formula
Number of atoms in a molecules
Number of isomers
Relative molecular mass
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Question # 16
Isotopes differ in the
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Number of neutrons
Number of protons
Number of electrons
Number of atoms
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Question # 17
How many isomeric disubtituted products are obtained by the introducing of second group in the ring
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Two
Three
Four
None
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Question # 18
C
2
H
5
OH can be differentiated from CH
3
OH by
Choose an answer
Reaction with HCl
Reaction with NH
3
Iodoform test
Solubility in water
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Question # 19
10g Of NaOH Has Been Dissolved Per
dm
3
of solution. The morality of solution is :
Choose an answer
0.025 M
1.5 M
0.1 M
.25 M
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Question # 20
What will react differently with the two isomeric pentols, (CH
3
)
3
CCH
2
OH and (CH
3
)
2
CH CH
2
CH
2
OH
Choose an answer
Acidified (aq) KMnO
4
Concentrated H
2
SO
4
PCl
Sodium
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Question # 21
Which on of the following compounds does not exist?
Choose an answer
NCl
5
AsF
5
SbCl
5
PF
5
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Question # 22
Acidic hydrolysis of acetamide gives
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Acetaldehyde
Acetic acid
Methyl amine
Formic acid
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Question # 23
Which carbonate of alkali metals is insoluble in water
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Na
2
CO
3
K
2
CO
3
Li
2
CO
3
Cs
2
CO
3
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Question # 24
Which period starts from
11
Sc to
30
Zn ?
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First Period
Second Period
Third Period
4th Period
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Question # 25
A phtotographic plate is coated with an emulsion of silver nitrate and
Choose an answer
AgCI
AgI
AgBr
NaNO
3
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Question # 26
Natural fertilizers are materials derived from
Choose an answer
Plants only
Animals only
Both plants and animals
None of these
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Question # 27
With increases of 10
°C temperature the rate of reactiondoubles. This increase in rate
of reaction
is due to :
Choose an answer
Decrease in activation energy or reaction.
Decrease in number of collisions between reactant molecules.
Increase in activation energy of reactants.
Increase in number of effective collisions
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Question # 28
Linear shape is associated with which set of hybrid orbitals
Choose an answer
sp
sp
2
sp
3
dsp
2
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Question # 29
Elevation of boiling point is measured by
Choose an answer
Beckmann's apparatus
Lands Berger's method
Antifreeze apparatus
None of these above
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Question # 30
The measurement of degree of disorder is
Choose an answer
Internal energy
Enthalpy
Entropy
None
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Question # 31
Most common oxidation states shownby cerium are
Choose an answer
+2, +4
+3, +4
+3, +5
+2, +3
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