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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
Styrene has empirical formula CH, and there is 92.2%C and 7.75% hydrogen. If molar mass is 104g mol¯, what will be integral multiple (n) to get molecular formula:
Choose an answer
2
4
6
8
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Question # 2
The transition temperature of tin is
Choose an answer
95.5 C°
13.2 C°
13.2°C
128.5°
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Question # 3
Neutralization of acid-base is
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Spontaneous
Exothermic
Non spontaneous
Both "a" and "c
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Question # 4
If Kc value is small then equilibrium position will shift
Choose an answer
Towards left
Remains unchanged
Towards right
lt is always constant value
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Question # 5
Which one of the following elements is not present in all protens
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Carbon
Hydrogen
Nitrogen
Sulphur
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Question # 6
The question vapour cause by heating a liquid is due to:
Choose an answer
increase of intermolecular interactions
increase of K.E of molecules
decrease of surface tension
increase in potential energy of molecules
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Question # 7
Carbon Monoxide is:
Choose an answer
colouriess
orderless
high toxic
All of these
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Question # 8
A state function which describes together the internal energy and product of pressure and volume is called
Choose an answer
Enthalpy
internal energy
Work
Kinetic energy
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Question # 9
Mg(s) + 2HCI(aq). ------------ MgCl2(aq)+ H2(g)
Given that; Mg=21g and HCI=21g, the excess reactant is
Choose an answer
Mg
HCI
Both are in stoichiometric amounts
None of these
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Question # 10
Which of the folowing compound is expected to be colored
Choose an answer
Na2SO4
ZnCl2
MgF
2
CuF
2
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Question # 11
Boiling point of acetic acid is
°C:
Choose an answer
116
117
118
119
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Question # 12
Aldehydes and ketones are carbonyl compounds. Which of them react both with NaBH
4
and with Tollen's reagent
Choose an answer
Both aldehydes and ketones
Aldehydes only
Ketones only
Neither aldehydes nor ketones
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Question # 13
A solution can be
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Dilute and concentrated
Saturated and dilute
Saturated and unsaturated
Supersaturated and saturated
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Question # 14
Ozone hole refers to
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Hole in ozone layers
Reduction in thickness of ozone layer in stratosphere
Reduction of thickness of ozone in troposphere
Increase concentration of ozone
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Question # 15
The covalent bonds are
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Unidirectional
Bi-directional
Non-directional
Multi-directional
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Question # 16
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 # 17
The shape of CIO
-
3
according to valence shell electron pair repulsion theory will be
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Planar triangle
Pyramidal
Tetrahedral
Square planar
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Question # 18
The fibre which is made from acrylonitrile as monomer:
Choose an answer
PVC
Rayon fibre
Acrylic fibre
Polyester fibre
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Question # 19
Which of the following undergoes uncleophilic substitution exclusively by S
N
1 mechanism?
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Benzyl chloride
Ethyl chloride
Chlorobenzene
Isopropyl choride
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Question # 20
Isotopes differ in
Choose an answer
properties which depend upon mass
arrangement of electrons in orbitals
chemical properties
the extent to which they may be affected in electric fields
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