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Question
Chemistry
A sample of NaClO3 is converted by heat to NaCl with a loss of 0.16 g of oxygen. The residue is dissolved in water and precipitated as AgCl. The mass of AgCl (in g) obtained will be: (Given: Molar mass of AgCl = 143.5 g mol-1)
Q. A sample of
N
a
Cl
O
3
is converted by heat to NaCl with a loss of
0.16
g
of oxygen. The residue is dissolved in water and precipitated as
A
g
Cl
. The mass of
A
g
Cl
(in g) obtained will be : (Given : Molar mass of
A
g
Cl
=
143.5
g
m
o
l
−
1
)
3217
219
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JEE Main 2018
Some Basic Concepts of Chemistry
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A
0.35
14%
B
0.41
22%
C
0.48
54%
D
0.54
10%
Solution:
The reaction is
2
N
a
Cl
O
3
⟶
Δ
2
N
a
Cl
+
3
O
2
3
m
o
l
of
O
2
=
2
m
o
l
of
N
a
Cl
=
2
m
o
l
of
A
g
Cl
Number of moles of
O
2
=
32
0.16
=
0.005
m
o
l
0.005
m
o
l
of
O
2
=
0.005
×
3
2
=
0.0033
m
o
l
of
A
g
Cl
The mass of
A
g
Cl
obtained will
b
e
=
143.5
×
0.0033
=
0.48
g