Tardigrade
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Tardigrade
Question
Chemistry
Which of the following compound, on reaction with NaOH and Na 2 O 2, gives yellow colour?
Q. Which of the following compound, on reaction with
N
a
O
H
and
N
a
2
O
2
, gives yellow colour?
1808
187
AIIMS
AIIMS 1997
The d-and f-Block Elements
Report Error
A
Z
n
(
O
H
)
2
33%
B
A
l
(
O
H
)
3
33%
C
C
r
(
O
H
)
3
33%
D
C
a
C
O
3
0%
Solution:
Yellow colour is due to the formation of
C
r
O
4
2
−
ion.
C
r
(
O
H
)
3
+
N
a
O
H
+
N
a
2
O
2
→
N
a
2
C
r
O
4
+
2
H
2
O