name the compound used to make beaker glass, test tubes, etc with reason

Question

anonymous · Answer

i think its by process of thin layer chromatography ....i.e " TLC" right ......

anonymous · Answer

Silicon dioxide (SiO2) also called silica.  There are, however, many different allotropes of silica, and adding small amounts of other materials can significantly change the properties of the glass.  Lab glass is mostly "borosilicate" glass, so it has slight extra boron in it, to improve its resistance to thermal shock (going from hot to cold suddenly).

Silica is a good material because it is very strong: the SiO2 groups form an extended network, so that much of the material is held together by strong chemical bonds.  It also is difficult to crystallize, so it forms a glass easily.  Being a glass makes it much more transparent, and also allows it to soften considerably below its melting point, which makes it easy to work and shape with a hot flame.

anonymous · Answer

no.. ok i m giving u the clue: the powder used for smoothing the surface while playing carrom board

anonymous · Answer

sorry carl didnt read ur ans u r rit..

anonymous · Answer

Borosilicate glass. It has a low coefficient of thermal expansion (it doesn't change in volume much with temperature) so it doesn't crack when it heats and cools unlike normal glass.