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KCET 2017 Chemistry Solved Paper
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© examsnet.com
Question : 25
Total: 60
By passing electric current,
N
a
C
l
O
3
is converted into
N
a
C
l
O
4
according to the following equation
N
a
C
l
O
3
+
H
2
O
→
N
a
C
l
O
4
+
H
2
How many moles of
N
a
C
l
O
4
will be formed when three Faradays of charge is passed through
N
a
C
l
O
3
?
0.75
1.0
1.5
3.0
Validate
Solution:
N
a
C
l
O
3
+
H
2
O
⟶
N
a
C
l
O
4
+
H
2
Change in number of electrons = 2
mole of
N
a
C
l
O
3
required 2 F of charge to convert into 1 mole of
N
a
C
l
O
4
⇒ 1F will convert ½ moles of
N
a
C
l
O
3
into
N
a
C
l
O
4
⇒
3
F
=
1
2
×
3
moles of
N
a
C
l
O
4
=
1.5
mol.
© examsnet.com
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