Discussion
The major component used in preparation of different types of glasses is :
Answer: A
Silica is the major component of glass.
Ordinary soda-lime glass is about 75 per cent \(\mathrm{SiO_2}\), with sodium carbonate to lower the melting point and limestone to make the product insoluble. Adding boron oxide instead gives borosilicate glass, which expands little on heating.
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