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Byju's Answer
Standard XII
Chemistry
Potassium Dichromate
Which of the ...
Question
Which of the following is not formed when
H
2
S
reacts with acidic
K
2
C
r
2
O
7
solutions?
A
K
2
S
O
4
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B
C
r
2
(
S
O
4
)
3
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C
S
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D
C
r
S
O
4
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Solution
The correct option is
D
C
r
S
O
4
K
2
C
r
2
O
7
+
H
2
S
→
C
r
2
(
S
O
4
)
3
+
S
+
K
2
S
O
4
+
H
2
O
The oxidation number of chromium changes from +6 to +3, not to 2! so
C
r
S
O
4
cannot be formed.
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