A) \[N{{a}_{2}}O.CaO.6Si{{O}_{3}}\]
B) \[N{{a}_{2}}O.A{{l}_{2}}{{O}_{3}}.Si{{O}_{2}}\]
C) \[CaO.A{{l}_{2}}{{O}_{3}}.Si{{O}_{2}}\]
D) \[N{{a}_{2}}O.CaO.6Si{{O}_{2}}\]
Correct Answer: D
Solution :
The composition of the common glass is \[N{{a}_{2}}O.CaO.6Si{{O}_{2}}\].
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