Elements and Compounds TNPSC Group 2 2A Questions

Chemistry

Elements and Compounds MCQ Questions


13.
The chemical property of elements are related to their
A.
atomic weight
B.
atomic number
C.
number of neutrons in the nucleus
D.
valency
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ANSWER :
D. valency
14.
The inner transition element among the following is
A.
scandum
B.
Lanthanam
C.
titanium
D.
cesium
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ANSWER :
B. Lanthanam
15.
The only element which is NOT containing neutrons in its nucleus is
A.
berylium
B.
helium
C.
an isotope of hydrogen
D.
an isotope of sodium
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ANSWER :
C. an isotope of hydrogen
16.
The Element with the maximum number of stable isotopes in nature is ____
A.
carbon
B.
Tin
C.
hydrogen
D.
lead
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ANSWER :
B. Tin
17.
Which one of the following is a transition element?
A.
Helium
B.
Sodium
C.
Copper
D.
Fluorine
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ANSWER :
C. Copper
18.
Element which is an enemy of copper is
A.
sulphur
B.
carbon
C.
chlorine
D.
nitrogen
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ANSWER :
A. sulphur