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Chemistry - 9 Chapter - 3
Atomic Structure
Test - 14
1.
The mass of proton is equal to the mass of hydrogen nucleus H+
a) True
b) False
2.
When an electric current is passed through any gas at low pressure its atom split into electrons, protons and neutrons
a) False
b) True
3.
According to the Dalton's atomic theory, an atom can be broken
a) True
b) False
4.
J.J Thomson determined the e/m ratio of electrons
a) True
b) False
5.
Uranium is an radioactive element
a) True
b) False
6.
Radioactive rays are of two types only
a) True
b) False
7.
Positive rays are the example of radioactive rays
a) True
b) False
8.
J.J Thomson proposed Atomic spectrum....
a) True
b) False
9.
As uranium is a radioactive element so it has no isotopes.
a) True
b) False
10.
Heavy water composed of protium and oxygen.
a) False
b) True
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