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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
The amount of energy released when gaseous ions of opposite charges combine to give one mole of a crystalline ionic compound is called
Choose an answer
bond energy
heat of formation
lattice energy
ionization energy
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Question # 2
H3O+ can't accept a Ip because
Choose an answer
it has positive charge
The central atom is not electron deficient
The shell of oxygen has reached its limit
it already has a coordinate bond
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Question # 3
Glucose and gulose are ____ for each other
Choose an answer
Geometrical isomers
Metamers
Apimers
None
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Question # 4
The molecules of air don't settle down. This is due to:
Choose an answer
non-polar nature of gases
different molar mass
elastic collisions of gas molecules
pressure of dust particles in air
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Question # 5
Which of the following does not give flame test?
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Li
Ba
Mg
Sr
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Question # 6
Boron, aluminium, gallium, indium and thallium belong to group lll-A of the periodic table show a decrease with increasing relative atomic mass:
Choose an answer
Ionic character of the compounds
The first ionization energy
The basic character of the oxides
The stability of +2 oxidation
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Question # 7
The cause of minamata disease is the pollution of
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Arsenic (As) into atomosphere
Industrial waste having Hg
Organic waste in drinking H
2
O
Oil spills in H
2
O
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Question # 8
Which of the following waster material is not recycled for use again
Choose an answer
paper
plastic
hides of animals
glass
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Question # 9
Which of the following is a thermosetting plastic?
Choose an answer
PVC
polyethylene
polystyrene
melamines
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Question # 10
Addition of unsymmetrical reagent to an unsymmetrical alkene is governed by
Choose an answer
Cannizzaro's Reaction
Aldol Condensation
Kirchhoff Rule
Markownikov's Rule
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Question # 11
Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
Choose an answer
It attaches to sulphur of the disulphide link
Hg is a heavy metal
Hg is liquid at room temperature
Hg is reactive chemically
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Question # 12
The formula of esters is
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Question # 13
Which of the following is directly related with entropy
Choose an answer
Pressure
Degree of freedom
Temperature
Both b and c
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Question # 14
The pH of 10
-3
mole dm
-3
of an aqueous solution of H
2
SO
4
is
Choose an answer
3.0
2.7
2.0
1.5
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Question # 15
The only alcohol that can be prepared by the indirect hydration of alkene is
Choose an answer
ethyl alcohol
propyl alcohol
isobutyl alcohol
methyl alcohol
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Question # 16
Rectified spirit contains alcohol about
Choose an answer
80%
85%
90%
95%
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Question # 17
The branch of science dealing with structure, composition and changes in matter and laws and principles which govern these changes is called as
Choose an answer
chesmistry
Geology
Physics
Mechanics
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Question # 18
Saturated solution of NaCl on heating becomes
Choose an answer
Super saturated
Unsaturated
Remains saturated
None
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Question # 19
Which statement is incorrect for balancing of redox reactions by ion-electron method
Choose an answer
The reaction is splitted into two half reactions
H
2
O and H
+
ions are added for acidic or neutral reaction to balance O and H atoms
To balance H, HCi, is added
To balance O and H in the alkaline reaction OH
-
added
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Question # 20
Find the magnetic moment of a divalent ion in aqueous solution if its atomic number is 25
Choose an answer
3.0 BM
4.9 BM
5.9 BM
6.9 BM
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Question # 21
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 # 22
The diameter of atoms is of the order:
Choose an answer
2* 10
-5
m
2* 10
-10
m
2* 10
-2
m
2* 10
-3
m
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