Basic Concepts of Chemistry AFCAT Questions

AFCAT Chemistry

Basic Concepts of Chemistry MCQ Questions


7.
How many electrons does a Sulphur atom have?
A.
2
B.
10
C.
20
D.
16
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ANSWER :
D. 16
8.
Rutherford found that α-rays consists of high energy particles carrying _____ units of positive charge and _____ unit of atomic mass
A.
Four, two
B.
One, two
C.
Three, three
D.
Two, four
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ANSWER :
D. Two, four
9.
The number of protons present in the nucleus is equal to _____
A.
Proton number
B.
Neutron number
C.
Atomic number
D.
Mass number
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ANSWER :
C. Atomic number
10.
The hydrogen atom containing 1 proton and 2 neutrons is called _____
A.
Nucleons
B.
Tritium
C.
Deuterium
D.
None of these
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ANSWER :
B. Tritium
11.
What is the atomic number of Nitrogen?
A.
6
B.
7
C.
12
D.
1
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ANSWER :
B. 7
12.
The chemical properties of atoms are controlled by the number of _____ which are determined by the number of protons in the nucleus
A.
Nucleons
B.
Nucleus
C.
Neutrons
D.
Electrons
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ANSWER :
D. Electrons