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Question
Chemistry
Philosopher's wool on treatment with cobalt nitrate produce :
Q. Philosopher's wool on treatment with cobalt nitrate produce :
1374
193
AFMC
AFMC 2002
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A
CoBaO
B
CoZnO
C
CoSrO
D
CoMgO
Solution:
Z
n
O
is philospher's wool.
Z
n
O
is an amphoteric oxide. It reacts with
C
o
(
N
O
3
)
2
as follows
Z
n
O
+
C
o
(
N
O
3
)
2
⟶
C
o
Z
n
O
+
2
N
O
2
↑
+
O
2
↑