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ECAT Chemistry Online Test MCQs With Answers
Question # 1
When the solute is present in trace quantities the following expression is used
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Gram per million
Milligram percent
Microgram percent
Parts per million
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Question # 2
Which of the following reaction is characteristic of benzene
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Electrophilic substitution reaction
Reduction
Oxidation
Ozonolysis
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Question # 3
The next homologue of C
10
H
22
will be
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C
9
H
20
C
12
H
26
C
11
H
24
C
13
H
28
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Question # 4
Which of the following statements is true about Galvanic cell
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Anode is negatively charged
Reduction occurs at anode
Cathode is positively charge
Reduction occurs at cathode
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Question # 5
The alkaline earth elements have in their s-orbital
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One electron
Two electron
No electron
Three electron
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Question # 6
The geometry of acetylene is
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Angular
Bent
Trigonal
Linear
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Question # 7
Which of the following reactions is used for detecting presence of carbonyl group?
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Reaction with hydroxylamine
Reaction with hydrazine
Reaction with phenyl hydrazine
All
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Question # 8
The compound prepared by a substitution reaction of benzene is
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Acetophenone
Glyoxal
Cyclohexame
Hexabromo cyclohexane
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Question # 9
Enthalpy of neutralization of all the strong acids and strong bases has the same value because
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Neutralization leads to the formation of salt and water
Strong acids and bases are ionic substances
Acid always give rise to H
+
ions and bases always furnish OH
-
ions
The net chemical change involve the combination of H
+
and OH
-
ions to form water
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Question # 10
When 0.1 g of magnesium is treated with an excess of hydrochloric acid, what volume of gas at room temperature and pressure will be produced
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10 cm
3
25 cm
3
48 cm
3
100 cm
3
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Question # 11
Which gas is produced by treating CaC
2
with water
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Methane
Ethane
Acetylene
HCI
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Question # 12
Choose an answer
Zn
H
S
O
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Question # 13
B-atom in BF
3
has
Choose an answer
sp
3
hybridization
sp
2
hybridization
sp hybridization
no hybridization
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Question # 14
In a group, the ionization energy
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Increase
Decreases
Remain constant
First increases then decreases
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Question # 15
Reduction or oxidation potential of standard hydrogen electrode is :
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0.0 Volt
0.8Volt
1.0Volt
1.8Volt
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Question # 16
Zeotropic mixture
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Obey Henry's law
Obey Raoult's law
Does not obey Raoult's law
Obey Dalton's law
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Question # 17
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Question # 18
The branch of science dealing with structure, composition and changes in matter and laws and principles which govern these changes is called as
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chesmistry
Geology
Physics
Mechanics
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Question # 19
Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?
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Chlorination, nitration, reducing
Nitration, chlorination, reducition
Nitration, reduction,chlorination
Nitration, reduction, acylation, chlorination, hydrolysis
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Question # 20
Down's cell is used to prepare
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Sodium carbonate
Sodium bicarbonate
Sodium metal
Sodium hydroxide
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Question # 21
Choose an answer
-1.10 V
+1.10 V
-0.42 V
+0.42 V
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Question # 22
Formula of chloroform is:
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CH
3
Cl
CCl
4
CH
2
Cl
2
CHCl
3
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Question # 23
Three sp
2
hybrid are co-planar at an angle of
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104.5°
109.5°
107°
120°
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Question # 24
The reactivity order of alkyl halides for a particular alkyl group is:
Choose an answer
F >Cl>Br>I
Cl>Br>F>l
l>Br>Cl>F
Br>l>Cl>F
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Question # 25
The experimental relationship between a reaction rate and the concentration of reactants is called
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Order or reaction
Rate law
Activated complex
Molecularity
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Question # 26
Content of carbon in steel is:
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0.12 to 0.25%
0.25% to 2.5%
3.0 to 3.5%
4.0 to 4.5%
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Question # 27
Which substances have
Δ
H =
Δ
E
Choose an answer
Solids
Liquids
Gases
Liquids and solids
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Question # 28
The formula of esters is
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Question # 29
10% aqueous solution of NaCI has molarity
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1.7 M
2.7 M
0.17 M
3.7 M
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Question # 30
Which of the following is used as disinfectant
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K
2
Cr
2
O
7
KMnO
4
K
2
MnO
4
K
2
CrO
4
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Question # 31
What is going to replace the petroleum?
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Silica
Silicates
Silicones
Silicon
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