The acid used for etching the glass is

The acid used for etching of glass is

Artifical gem used for cutting glass is

What is etching of glass ?

The phenomena 'etching' on glass is due to the formation of

Hydrolysis of compound A , two acids P and Q forms, P is used in etching of glass, Q on strongly heating gives a oxide R. R is used in estimation of carbon monoxide . Calculate total number of lone pairs on compound A .

Which type of glass is used for making glass reinforced plastic?