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Byju's Answer
Standard XII
Chemistry
Uses of Slaked Lime
LaOH3 is more...
Question
L
a
(
O
H
)
3
is more basic than
L
u
(
O
H
)
3
.
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Solution
Due to lanthanide contraction
as the size of lanthanide ions decreses from La3+ to Lu3+ , the covalent character of the hydroxides increases and hence the basic strength decreases.
La(OH)3 is most basic and Lu(OH)3 is least basic.
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Similar questions
Q.
Consider the following statements with respect to lanthanides:
1. The basic strength of hydroxides of lanthanides increases from
L
a
(
O
H
)
3
to
L
u
(
O
H
)
3
.
2. The lanthanide ions
L
u
3
+
,
Y
b
2
+
a
n
d
C
e
4
+
are diamagnetic.
Which of the statement(s) given above is/are correct?
Q.
Observe the following statements.
1
. Lanthanides actively participate in chemical reactions.
2
. The basic nature of hydroxides of lanthanides increases from
L
a
(
O
H
)
3
to
L
u
(
O
H
)
3
.
3
. Lanthanides do not form coordinate compounds as readily as d-block metals.
The correct statements are:
Q.
The compound
(
S
i
H
3
)
3
N
is expected to be:
Q.
Consider thiol anion (
R
S
−
) and alkoxy anion (
R
O
−
). Which of the following statements is correct?
Q.
NaOH is more basic than LIOH.
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