65ᵗʰ B.P.S.C. (Re-Exam) (Pre) 2020
What is the glass used in tube lights and test tubes made of?
aSilica
bCalcium carbonate
cSodium carbonate
dGlass fragments
eNone of the above/More than one of the above✓ Correct
Explanation
The glass used in tube lights and test tubes is an amorphous, transparent mixture of alkali metal silicates. It is prepared from silica, cerium oxide, sodium oxide, and other oxides.
general-geography