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Chemistry 9th Class English Medium Unit 2 Online Test MCQs With Answers
Question # 1
________________ orbital is more complex in shape.
Choose an answer
s
p
f
d
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Question # 2
The number of isotopes of carbon are
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1
2
3
5
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Question # 3
Atoms of elements combine chemically to form:
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Mixtures
compounds
solutions
ions
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Question # 4
L shell can accommodate ________________ electrons.
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2
8
18
32
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Question # 5
________________ proposed that matter is composed of small particles.
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Greek
English's
Russian
Nil
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Question # 6
The lowest energy level is
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K
L
M
N
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Question # 7
Which of the following can accommodate 18 electrons?
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K
L
M
N
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Question # 8
Which one of the following is the most penetrating?
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protons
electrons
neutrons
alpha paticles
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Question # 9
Cathode rays are actually
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Electrons
Protons
Neutrons
Photons
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Question # 10
___________ is used in treatment of cancer.
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Cobalt-60
C-12
H-3
Nil
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Question # 11
The no.of neutrons in deutrium is
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1
2
3
4
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Question # 12
The isotopes of an element have different number of
Choose an answer
Electrons
Protons
Neutrons
Protons & Neutrons
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