Class 9 Chemistry MCQ Chapter 2

9th Class Chemistry MCQS, 9th Class MCQS, MCQS 0

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The concept of orbit was used by:
J.J Thomson
Rutherford
Bohr
Planck
Canal rays are actually
Electrons
Protons
Neutrons
X-rays
In ________________ Rutherford’s was studying radiations.
1911
1931
1921
1922
Neuron was discovered by
Sir Willium Crooks
Goldstein
James Chadwik
Neil Bohr
When U-235 breaks up, it produces?
electrons
neutrons
protons
nothing
In 9th century scientist accepted by:
Dalton
Bohars
Rutherford
Nil
________________ proposed that matter is composed of small particles.
Greek
(‘radio-button-click-target’, “English’s”)
Russian
Nil
Hydrogen has ________________ isotopes.
1
2
3
4
The no.of neutrons in deutrium is
1
2
3
4
Which radioisotope is used for the diagnosis of tumor in the body?
cobalt-60
iodine-131
strontium-90
phosphorus-30

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