1.

The approximate composition of soda glass is :

Answer»

`SiO_2 75%, Na_2O 15%,CAO 8%,Al_2O_3 2%`
`SiO_2 45%,Na_2O 4%,CaO 3%,K_2O 4%,PBO 44%`
`SiO_2 80%,Na_2O 4%,CaO 0.5%,K_2O 0.5%,B_2O_3 12%,Al_2O_3 3%`
None of the above

Answer :A


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