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KEAM 2011 Physics and Chemistry Paper
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© examsnet.com
Question : 105
Total: 120
In the reaction
H
2
S
+
H
2
O
2
→
S
+
2
H
2
O
H
2
S
is an acid and
H
2
O
2
is a base
H
2
S
is a base and
H
2
O
2
is an acid
H
2
S
is an oxidizing agent and
H
2
O
2
is a reducing agent
H
2
S
is a reducing agent and
H
2
O
2
is an oxidising agent
H
2
S
is hydrolysed to S
Validate
Solution:
Here, the oxidation number of S increases from -2 in
H
2
S
to 0 in elemental sulphur, while that of
O
decreases from -1 in
H
2
O
2
to -2 in
H
2
O
therefore
H
2
S
is a reducing agent and
H
2
O
2
is an oxidising agent.
© examsnet.com
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