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Standard XII
Chemistry
Introduction to d and f Block Elements
Question
Which of the following group belongs to actinide series ?
Th, Pa, U
Ba, La, Hf
Ce Pr, Nd
Pt, Au, Ag
A
Th, Pa, U
B
Pt, Au, Ag
C
Ce Pr, Nd
D
Ba, La, Hf
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Solution
Verified by Toppr
T
h
(
t
h
o
r
i
u
m
)
,
P
a
(
p
r
o
a
c
t
i
n
i
u
m
)
and
U
(
u
r
a
n
i
u
m
)
belongs to actinoid series.
C
e
P
r
,
N
d
are lanthanoids.
B
a
,
L
a
,
H
f
belongs to the sixth period.
P
t
,
A
u
,
A
g
are transition elements.
Hence, option
A
is correct.
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