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Tardigrade
Question
Chemistry
The most basic hydroxide from following is
Q. The most basic hydroxide from following is
2005
204
MHT CET
MHT CET 2018
The d-and f-Block Elements
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A
P
r
(
O
H
)
3
(
Z
=
59
)
11%
B
S
m
(
O
H
)
3
(
Z
=
62
)
13%
C
Ho
(
O
H
)
3
(
Z
=
67
)
24%
D
L
a
(
O
H
)
3
(
Z
=
57
)
52%
Solution:
Due to lanthanoid contraction, the basic character of hydroxides decreases from
L
a
3
+
to
L
u
3
+
As a result, covalent nature of
L
n
—
O
H
bond also increases. Thus, the most basic hydroxide among the given option is
L
a
(
O
H
)
3