[" How making poody quality before glass are used These are obbaing moltan plang of "],[" meth which does not solidity before glass.The metal used can be."],[[" Is solum "," (2) Megancsium "," (3) Mercury "]],[" be Soluction "," (2) Megancsium "]

For making good quality mirrors, the plates of flint glass are used. These are obtained by floating molten glass over a liquid metal which does not solidify before glass. The metal used can be

For making good quality mirrors, the plates of flint glass are used. These are obtained by floating molten glass over a liquid metal which does not solidify before glass. The metal used can be

How many different positive integers can be formed using the digits 0,1,2 and 3 in which repetition of digits is not allowed?

Covers for cans are stamped out of sheet of metal.How many cm^(2) of waste material are there when the covers are cut from a square 5 cm wide (use pi=3.14)

How many mL of perhydrol is required to produce sufficient oxygen which can be used to completely convert 2 L of S O_(2) gas to SO_(3) gas?

Two lenses having f_(1):f_(2)=2:3 has combination to make no dispersion. Find the ratio of dispersive power of glasses used

On fusion of a mixture of Na_2CO_3 and CaCO_3 with silica at 1500^@C , a liquid consisting of silicates of sodium and calcium is formed. On cooling . Liquid become viscous and eventually ceases to flow . It becomes solid and is known as glass. By varying the proportions of the three basic ingredients and by adding other substances, the properties of glass can be altered, Glass can be represented as R_2 O. MO.6SiO_2 , where R= Na or K, M = CaBa, Zn or PbSiO_2 may be replaced by Al_2 O_3 , B_2 O_3 or P_2 O_5 . Coloured glasses are obtained by adding certain metallic oxides or salts in the fused mass, Glass is attached by HF and this property is used to make marking on the glass , This is known as etching . The glass on rapid cooling becomes brittle and fragile . The articles of glass are cooled neither slowly nor very rapidly . The process of gradual cooling of glass is called annealing . Glass is .