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EAMCET Engineering 2006 Solved Paper
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© examsnet.com
Question : 56
Total: 160
A
B
is an ionic solid. The ionic radii of
A
+
and
B
−
are respectively
r
c
and
r
a
. Lattice energy of
A
B
is proportional to :
r
c
r
a
(
r
c
+
r
a
)
r
a
r
c
1
(
r
c
+
r
a
)
Validate
Solution:
The lattice becomes stronger (i.e., the lattice energy
U
becomes more negative), as
r
the inter ionic distance decreases.
U
is proportional to
1
r
or
U
∝
1
(
r
c
+
r
a
)
© examsnet.com
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