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ECAT Chemistry Online Test MCQs With Answers
Question # 1
The temperature at which the vapour pressure of a liquid becomes equal to external pressure is
Choose an answer
Melting point
Sublimation point
Inversion point
Boiling point
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Question # 2
Which of the following compounds does not react with NaHSO
3
?
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C
6
H
5
CHO
Acetophenone
Acetone
Acetaldehyde
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Question # 3
In Friedal-Craft's alkylation besides AlCl3 the other reactants are
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C6H6 + NH3
C6H6 + NH4
C6H6 + CH3Cl
C6H6 + CH3COCl
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Question # 4
The number of isotopes of gold is
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3
1
2
4
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Question # 5
Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
Choose an answer
Pb
Cr
Hg
All of these
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Question # 6
Density of aluminium is (g cm
-3
):
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B
Al
Si
Ge
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Question # 7
Which of the following has magnesium?
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Carbonic anhydrase
Haemocyanin
chlorophyll
Vitamin B
12
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Question # 8
The raw materials for the manufacture of urea fertilizer is
Choose an answer
Hydrogen and ammonia
Steam, methane, ammonia
Methane and air
None of these
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Question # 9
Which compound is both chiral and acidic
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Question # 10
The acid present in vinegar is
Choose an answer
CH
3
COOH
HCI
H
2
SO
4
HCOOH
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Question # 11
To differentiate isomers we use
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n-
iso-
neo
All of them
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Question # 12
1 erg of energy corresponds to
Choose an answer
6.02 x 10
23
J/mol
6.02 x 10
16
J/mol
1 erg/mol
10
-7
J/mol
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Question # 13
The rate of reaction determined at a given time is called
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Average rate
Instantaneous rate
Specific rate
Overall rate
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Question # 14
Alkyl benzenes are readily oxidized by axidfied
Choose an answer
KMnO
4
K
2
CO
3
MnO
4
H
2
SO
4
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Question # 15
The hydrocarbons having double bonds normally end with suffix
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Ane
Ene
Yne
Oic
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Question # 16
Benzene is an example of
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Aromatic compound
Cyclic compound
Aliphatic compound
A cyclic compound
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Question # 17
Cathode rays drive a small paddle wheel placed in their path. This observation shows that
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Cathode rays travel in straight lines
Cathode rays are negatively charged
Cathode rays produce x-rays
Cathode rays are material particles having momentum
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Question # 18
Cyanohydrin of which of the following forms lactic acid
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HCHO
CH
3
COCH
3
CH
3
CHO
CH
3
CH
2
CH
2
CHO
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Question # 19
Which of the following isoelectronic ions has the lowest ionization energy?
Choose an answer
K
+
Ca
2+
Cl
-
S
2-
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Question # 20
Solubility cure of Na
2
SO
4
10H
2
shows
Choose an answer
Constant increase of solubility
Constant decreases of solubility
Discontinuously solubility wit temperature
None of above
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Question # 21
Sodium is never found free in nature because of its
Choose an answer
Chemical reactivity
Small ionic size
Small atomic volume
None of these
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Question # 22
Determination of atomic masses and invention of system of writing symbols was made by:
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J. Berzelius
Democritus
Dalton
None of above
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Question # 23
The total number of transition elements is:
Choose an answer
10
14
40
50
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Question # 24
The number of atoms present in molecule determines its:
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Molecularity
Atomicity
Basicity
Acidity
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Question # 25
Which of the following is not a fatty acid?
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Propanoic acid
Acetic acid
Phthalic acid
Butanoic acid
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Question # 26
Phosphine is not obtained by the reaction when
Choose an answer
White P is heated with NaOH
Red P is heated with NaOH
Ca
2
P
2
reacts with water
PH
4
l is boiled with water
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Question # 27
The self linking of carbon atoms is called
Choose an answer
Chelation
Isomerism
Catenation
None of the above
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Question # 28
Lead accumulator contains
Choose an answer
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 # 29
Lime, calcium oxide, is used in agriculture for
Choose an answer
Adding ca metal in soil
Making soil acidic
Neutralizing acidic soil
Adding oxygen to soil
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Question # 30
When phenol is reduced in the presence of Zn dust, we get
Choose an answer
Cyclohexene
Cyclohexane
Benzene
Benzyne
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Question # 31
The other name for distribution law is
Choose an answer
Dispersive law
Partition law
Avogadro's law
separation law
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