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Online Tests
Chemistry 9th Class English Medium Unit 2 Online Test MCQs With Answers
Question # 1
The concept of orbit was used by:
Choose an answer
J.J Thomson
Rutherford
Bohr
Planck
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Question # 2
The p subshell has:
Choose an answer
one orbital
two orbitals
three orbitals
four orbitals
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Question # 3
___________ is used in treatment of cancer.
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Cobalt-60
C-12
H-3
Nil
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Question # 4
The isotopes C-12 is present in abundance of:
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96.6%
97.6%
99.7%
None of these
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Question # 5
When U-235 breaks up, it produces?
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electrons
neutrons
protons
nothing
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Question # 6
The number of isotopes of carbon are
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1
2
3
5
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Question # 7
________________ orbital is more complex in shape.
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s
p
f
d
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Question # 8
Half life of C-14 ________________ years.
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5800
5700
5600
5500
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Question # 9
Which of the following can accommodate 18 electrons?
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K
L
M
N
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Question # 10
For diagnosis of goiter in thyroid gland we use
Choose an answer
Co-60
C-14
I-131
Sr-90
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Question # 11
In 9th century scientist accepted by:
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Dalton
Bohars
Rutherford
Nil
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Question # 12
________________ proposed that matter is composed of small particles.
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Greek
English's
Russian
Nil
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Question # 13
The value of Planck's constant is
Choose an answer
6.63 x 10-34 Js
6.63 x 10-32 Js
6.63 x 10-30 Js
6.63 x 10-28 Js
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Question # 14
Deuterium is used to make:
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light water
heavy water
soft water
hard water
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Question # 15
Which one of the following shell consists of three subshells?
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K- shell
M-Shell
L-shell
M-shell
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Question # 16
First energy level is denoted by:
Choose an answer
K
L
M
N
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Question # 17
"Atoms" means _________
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Divisible
Indivisible
Break
Nil
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Question # 18
Neuron was discovered by
Choose an answer
Sir Willium Crooks
Goldstein
James Chadwik
Neil Bohr
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