Elements Classification and Chemical Bonding CDS Questions

CDS Chemistry

Elements Classification and Chemical Bonding MCQ Questions


1.
Who proposed the 'Law of Octaves' in the classification of elements?
A.
Lothar Meyer
B.
Dmitri Mendeleev
C.
John Newlands
D.
Henry Moseley
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ANSWER :
C. John Newlands
2.
According to the Modern Periodic Law, the properties of elements are a periodic function of their:
A.
Atomic mass
B.
Atomic volume
C.
Atomic radius
D.
Atomic number
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ANSWER :
D. Atomic number
3.
How many periods are present in the Modern Periodic Table?
A.
18
B.
7
C.
9
D.
8
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ANSWER :
B. 7
4.
How many groups are there in the Modern Periodic Table?
A.
32
B.
16
C.
18
D.
7
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ANSWER :
C. 18
5.
Which period of the periodic table is known as the longest period, containing 32 elements?
A.
Period 5
B.
Period 6
C.
Period 4
D.
Period 7
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ANSWER :
B. Period 6
6.
Transition elements are placed in which block of the periodic table?
A.
p-block
B.
f-block
C.
d-block
D.
s-block
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ANSWER :
C. d-block