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Online Tests
Chemistry 9th Class English Medium Unit 2 Online Test MCQs With Answers
Question # 1
What does keep the particles present in the nucleus intact.
Choose an answer
Particles are held together by dipolar force
Particles are held together by wee nuclear force
Particles are held together by strong nuclear force
Particles are held together by electrostatic force
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Question # 2
Which Isotopes is commonly used to irradiate cancer cells.
Choose an answer
Cobalt -60
Iodine-23
Carbon -14
Iodine-131
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Question # 3
Whcih Isotopes is used for diagonosis of goiter?
Choose an answer
Iodine-131
Cobalt -60
P-32
Sr-90
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Question # 4
Rutherford used a gold foil in his experiment, which had a tickness of
Choose an answer
0,0002 cm
0,0001 cm
0.001 cm
0.00004cm
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Question # 5
Why has isotopes not been shown int he periodic table.
Choose an answer
Isotopes do not show periodic behavior
Periodic tble cannot accomodate a large number of isotopes of different elements
All the isotops have same atomic number so there is no need to give them separate places
Someof the isotopes are unstble and they give rise to different elements.
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Question # 6
Mass Number is repreented by
Choose an answer
Z
S
A
M
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Question # 7
What will be the relative atomic mass of nitrogen given the abundance of its two isotopes,
14
N and
15
N are 99.64 and 0.35
Choose an answer
14.0210
14.2100
14.0021
14.1200
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Question # 8
A sub sheel that cna accommodate 6 electrons is
Choose an answer
b
s
f
p
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Question # 9
Atom is electrically
Choose an answer
Positive particle
Negaitve particle
Neutral particle
None of these
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Question # 10
How is radio carbon dating useful for archeolgists.
Choose an answer
It helps detemine whether the matter is radioactie or not
It helps determine the age of organic matter
It helps determine the composition of matter
It helps deterime the usefulness of matter
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Question # 11
Who performed fist experiment to split atom
Choose an answer
Bohr
Newton
Rutherford
Soddy
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Question # 12
Proton are feflected toward plate.
Choose an answer
Positive
Negative
Both a and b
None of these
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