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Tardigrade
Question
Chemistry
The catenation tendency of C, Si and Ge is in the order Ge < Si < C. The bond energies (in KJ mol-1) C - C, Si - Si and Ge-Ge bonds are respectively;
Q. The catenation tendency of
C
,
S
i
and
G
e
is in the order Ge
<
S
i
<
C
.
The bond energies
(
in
K
J
m
o
l
−
1
)
C
−
C
,
S
i
−
S
i
and
G
e
−
G
e
bonds are respectively;
2918
230
JEE Main
JEE Main 2013
The p-Block Elements
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A
398,180,167
71%
B
348,167,180
6%
C
180,167,348
3%
D
167,180,348
21%
Solution:
The linking of identical atoms with each other to form long chains is called catenation. However, this property decreases from carbon to lead. Decrease of this property is associated with M-M bond energy which decreases from carbon to lead.