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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
What is the formula of magnesite?
Choose an answer
PbS
MgSO4. 7H2O
MgCO3
CaCO3
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Question # 2
The sole produets of combustion analysis are
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CO2 and NH3
H2O and Mg(CIO4)2
CO2 and KOH
CO2 and H2O
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Question # 3
If 250 cm
3
of hydrogen gas is cooled from 127°C to -73°C at constant pressure then new volume of gas is ______ dm
3
Choose an answer
0.25
0.375
0.125
0.0625
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Question # 4
Silk is an example of
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animal fiber
vegetable fibre
mineral fibre
none of these
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Question # 5
One of the following compound reacts with its own oxidation product (an oxidation involves no loss of carbon) to give sweet odour liquid
Choose an answer
Propanal
Propanone
1-propanol
Propanoic acid
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Question # 6
The crystals formed due to London forces of interaction are
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ionic
covalent
molecular
metallic
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Question # 7
The crystal system are of
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7 types
10 types
5 types
8 types
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Question # 8
For gas obeying Boyle's law if pressure is double, the volume becomes:
Choose an answer
Remains constant.
Double.
One half.
None of above.
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Question # 9
Sex harmones belong to a group of organic compounds called:
Choose an answer
heterocyclics
steroids
amino acids
amines
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Question # 10
When water freezes at 0
°C, its density decreases due to
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cubic structure of ice
empty spaces present in the structure of ice
change of bond lengths
change of bond angles
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Question # 11
The change in enthalpy of a system when one mole of the substance is completely burnt in excess of air or oxygen is called
Choose an answer
Heat of reaction
Heat of formation
Heat of atomization
Heat of combustion
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Question # 12
Solvent extraction is an unstable, Process and it is called by:
Choose an answer
The amount of solute
Distribution law
The amount of solvent used
Law of mass action
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Question # 13
Which of the following is a not typical transition element
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Cr
Mn
Zn
Fe
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Question # 14
The rate constant k of a reaction activation energy Ea and temperature are related by Arrhenius in the form of an equation which is
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Question # 15
Outer shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be
Choose an answer
XY
X
2
Y
X
2
Y
3
XY
2
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Question # 16
The valence orbital configuration of an element with atomic number 23 is
Choose an answer
3d
5
3d
3
, 4s
2
3d
3
, 4s
1
, 4p
1
3d
2
,4s
2
,4p
1
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Question # 17
A cell constant is generally found by measuring the conductivity of aqueous solution of
Choose an answer
BaCl
2
KCl
NaCl
MgCl
2
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Question # 18
Carbon atom holding halogen in aryl halides is
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sp
2
-hybridesed
sp
3
-hybridesed
sp-hybridesed
sp
3
d-hybridesed
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Question # 19
Plastics are a pollution problem because many plastics
Choose an answer
Are made from petroleum
Are very inflammable
Burn to produce toxic fumes
Decompose to produce toxic products
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Question # 20
If the standard electrode potential of CU
2+
/Cu electrode is 0.34 V, what is the electrode potential of 0.01 M concentration of Cu
2+
? (T=298)
Choose an answer
0.399 V
0.281 V
0.222 V
0.176 V
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Question # 21
The number of moles of solute in 1000g (1 Kg) of the solvent is called :
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Molarity
Molarity
Normality
Mole fraction
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Question # 22
The colour of transition metal complexes is due to
Choose an answer
d-d transitions of electrons
Para magnetic nature of transition elements
Ionization
Loss of s-electrons
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