Elements Classification and Chemical Bonding CDS Questions

CDS Chemistry

Elements Classification and Chemical Bonding MCQ Questions


7.
Lanthanides and Actinides together constitute which block of the periodic table?
A.
s-block
B.
d-block
C.
p-block
D.
f-block
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ANSWER :
D. f-block
8.
Elements of Group 1 (excluding hydrogen) are commonly known as:
A.
Alkaline earth metals
B.
Alkali metals
C.
Noble gases
D.
Halogens
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ANSWER :
B. Alkali metals
9.
Group 17 elements of the periodic table are called:
A.
Chalcogens
B.
Pnictogens
C.
Halogens
D.
Noble gases
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ANSWER :
C. Halogens
10.
Group 18 elements, which have completely filled outer shells, are known as:
A.
Alkali metals
B.
Transition metals
C.
Halogens
D.
Noble gases
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ANSWER :
D. Noble gases
11.
Group 2 elements of the periodic table are referred to as:
A.
Metalloids
B.
Alkaline earth metals
C.
Alkali metals
D.
Transition metals
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ANSWER :
B. Alkaline earth metals
12.
Which scientist arranged 63 known elements based on increasing atomic weight into a table, leaving gaps for undiscovered elements?
A.
Henry Moseley
B.
John Newlands
C.
Johann Dobereiner
D.
Dmitri Mendeleev
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ANSWER :
D. Dmitri Mendeleev