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Question
Chemistry
Ordinary glass is formed by mixing of
Q. Ordinary glass is formed by mixing of
1517
191
Punjab PMET
Punjab PMET 2009
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A
N
a
2
C
O
3
+
C
a
C
O
3
B
N
a
2
C
O
3
+
C
a
C
O
3
+
silica
C
silica
+
N
a
2
C
O
3
D
silica + borax
Solution:
A mixture of silicates of sodium and calcium obtained by heating sodium carbonate, calcium carbonate and silica at about
1700
K
, is called ordinary glass or soda glass.
Na
X
2
CO
X
3
l
+
SiO
X
2
+
CaCO
X
3
1700
K
ordinary
glass
Na
X
2
SiO
X
3
⋅
CaSiO
X
3
⋅
4
SiO
X
2
+
CO
X
2