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AIEEE 2007 Solved Paper
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© examsnet.com
Question : 40
Total: 118
The stability of dihalides of
S
i
,
G
e
,
S
n
and
P
b
increases steadily in the sequence
P
b
X
2
<
<
Sn
X
2
<
<
G
e
X
2
<
<
S
i
X
2
G
e
X
2
<
<
S
i
X
2
<
<
Sn
X
2
<
<
P
b
X
2
SiX
2
<
<
G
e
X
2
<
<
P
b
X
2
<
<
Sn
X
2
SiX
2
<
<
G
e
X
2
<
<
Sn
X
2
<
<
P
b
X
2
Validate
Solution:
Reductance of valence shell electrons to participate in bonding is called inert pair effect. The stability of lower oxidation state (
+
2
for group 14 element) increases on going down the group. So the correct order is
S
i
X
2
<
G
e
X
2
<
S
n
X
2
<
P
b
X
2
© examsnet.com
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