Basic Concepts of Chemistry AFCAT Questions

AFCAT Chemistry

Basic Concepts of Chemistry MCQ Questions


1.
The electrons are the basic constituent of all the ______
A.
Molecules
B.
Protons
C.
Cathode
D.
Atoms
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ANSWER :
D. Atoms
2.
The positive charge and most of the mass of the atom was densely concentrated in extremely small region. This very small portion of the atom was called _____ by Rutherford
A.
Cation
B.
Atom
C.
Anode
D.
Nucleus
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ANSWER :
D. Nucleus
3.
"An atom possesses a spherical shape in which the positive charge is uniformly distributed". This was proposed in _____ model of atom.
A.
Rutherford
B.
J.J.Thomson
C.
Robert Boyle
D.
John Dalton
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ANSWER :
B. J.J.Thomson
4.
Atomic number is represented by
A.
Z
B.
X
C.
C
D.
m
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ANSWER :
A. Z
5.
The word ‘atom’ has been derived from the Greek word ‘a-tomio’ which means _____
A.
Non-divisible
B.
Uncuttable
C.
Both a and b
D.
Divisible
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ANSWER :
C. Both a and b
6.
Where do the protons and neutrons present in an atom?
A.
Pathway
B.
Ion
C.
Nucleus
D.
Orbit
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ANSWER :
C. Nucleus