Elementary Ideas About The Structure of Atom, Atomic Equivalent and Molecular Weights, Valency NDA Questions

NDA Chemistry

Elementary Ideas About The Structure of Atom, Atomic Equivalent and Molecular Weights, Valency MCQ Questions


1.
What is the charge of an electron?
A.
Negative
B.
Positive
C.
Neutral
D.
Zero
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ANSWER :
A. Negative
2.
Which subatomic particle has a mass nearly equal to that of a proton?
A.
Neutron
B.
Electron
C.
Proton
D.
Photon
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ANSWER :
A. Neutron
3.
The mass number of an atom is the sum of the number of__________
A.
Protons and neutrons
B.
Electrons and protons
C.
Electrons and neutrons
D.
Neutrons and photons
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ANSWER :
A. Protons and neutrons
4.
What is the atomic number of an element?
A.
Number of protons in the nucleus
B.
Number of protons
C.
Number of neutrons in the nucleus
D.
Number of electrons in an atom
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ANSWER :
B. Number of protons
5.
The number of electrons in a neutral atom is equal to the number of__________
A.
Protons
B.
Neutrons
C.
Photons
D.
Protons minus neutrons
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ANSWER :
A. Protons
6.
The concept of the atomic structure was given by__________
A.
Niels Bohr
B.
J.J. Thomson
C.
Ernest Rutherford
D.
Albert Einstein
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ANSWER :
B. J.J. Thomson