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Tardigrade
Question
Chemistry
When SO 2 is passed through acidified solution of potassium dichromate, then chromium sulphate is formed. The change in valency of chromium is
Q. When
S
O
2
is passed through acidified solution of potassium dichromate, then chromium sulphate is formed. The change in valency of chromium is
1392
214
MHT CET
MHT CET 2020
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A
+
4
to
+
2
B
+
5
to
+
3
C
+
6
to
+
3
D
+
7
to
+
2
Solution:
K
2
C
r
2
O
7
+
3
S
O
2
+
4
H
2
S
O
4
→
K
2
S
O
4
+
C
r
2
(
S
O
4
)
3
+
3
S
O
3
+
4
H
2
O
O.N. of chrominum changes from
+
6
to
+
3