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Question
Chemistry
Which one of the following pairs of elements is called chemical twins because of their very similar chemical properties?
Q. Which one of the following pairs of elements is called chemical twins because of their very similar chemical properties?
1674
192
KEAM
KEAM 2004
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A
M
n
and W
B
M
o
and
T
c
C
F
e
and
R
e
D
H
f
and
Z
r
E
F
e
and
C
o
Solution:
Z
r
and
H
f
possesses similar atomic size and hence are called twins of peridic table. It is due to lanthanide contraction.