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JEE Advanced Model Paper 10 with solutions for online practice
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© examsnet.com
Question : 30
Total: 54
Select the correct statements about the bleaching powder
The reaction
3
C
a
(
O
H
)
2
+
2
C
l
2
→
C
a
(
O
C
l
)
2
+
C
a
C
l
2
.
C
a
(
O
H
)
2
.
H
2
O
+
H
2
O
is used as the method of preparation
With limited quantity of acid it cannot act as oxidising agent
If any substance is bleached, then antichlor like hypo or
N
a
H
S
O
4
is used to remove excess of
C
l
2
Available chlorine is defined as
C
l
2
liberated when bleaching powder is allowed to react with dil
C
H
3
C
O
H
or dil HCl
Validate
Solution:
Answer (A, C, D)
With limited quantity of acids, it act as a bleachingagent due to the liberation of oxygen.
2
C
a
O
C
l
2
+
H
2
S
O
4
→
C
a
S
O
4
+
C
a
C
l
2
+ 2HOCl
HOCl → HCl + [O]
Coloured matter + [O] → colourless matter
C
a
O
C
l
2
+
2
C
H
3
C
O
O
H
→
(
C
H
3
C
O
O
)
2
Ca +
H
2
O
+
C
l
2
(Available Chlorine)
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