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Standard XI
Chemistry
Density
Ammonium dich...
Question
Ammonium dichromate is used in fire works. The green coloured powder obtained is:
A
C
r
O
3
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B
C
r
2
O
3
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C
C
r
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D
C
r
O
(
O
2
)
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Solution
The correct option is
B
C
r
2
O
3
Reaction when
(
N
H
4
)
2
C
r
2
O
4
is decomposed,
(
N
H
4
)
2
C
r
2
O
4
⟶
C
r
2
O
3
+
N
2
+
4
H
2
O
The green colour is due to the formation of
C
r
2
O
3
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