1.

Which raw material is used in the preparation of soft glass ?

Answer»

`K_(2)CO_(3),SiO_(2),CaCO_(3)`
`K_(2)CO_(3),SiO_(2),PbCO_(3)`
`Na_(2)CO_(3),SiO_2,CaCO_(3)`
`Na_(2)CO_(3),SiO_(2),PbO`

Solution :Soft glass of which bottles are made, is prepared by heating together SILICA `(SiO_(2))` , SODIUM carbonate `(Na_2CO_(3))` and LIME stone `(CaCO_(3))`


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