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Glasses: Types And Uses – Competitive Chemistry

Glasses: Types and Uses – Competitive Chemistry

Concept of – “Glasses: Types and Uses – Competitive Chemistry” is important for all competitive exams like CET- Common eligibility Test, SSC CGL, SSC CHSL, RRB NTPC, UPSC and for other state civil exams. In these exams, almost 4-5 questions are coming from Chemistry. Let’s start the topic on:-

Glasses and Their Prosperities


  • Glass is the homogenous mixture of the silicates of various alkaline metals, various metal oxides, mainly Soda (Na2O) and Lime (CaO).
  • The glass was firstly manufactured in Egypt.
  • Glass is a super cooled liquid. It is called supercooled liquid because glass is an amorphous solid. Amorphous solids have the tendency to flow but, slowly.
  • It is also an inorganic non-metallic material that does not have a crystalline structure. So, the constituent particles of the glass can move.
  • The main constituent of Flat Glass is SiO2 (silica sand).
  • Glass is widely used in various fields like laboratories, household products and for technological usage (labs) etc.

There are some types of Glasses: –

Flint Glass: Flint Glass

  • Sodium, Potassium and Lead-Silicates are used in manufacturing of Flint Glass.
  • These glasses mostly used in making electric bulbs, lenses of telescopes, microscopes, camera and prisms etc.


Water Glass:        

  • Water glass is manufactured from the compound of sodium silicate (Na2Si03) by heating sodium carbonate and silica.
  • It is widely used in kitchen as a drinking glass, tube light, bottles, equipment of laboratory.


Pyrex Glass:  pyrex glass       

  • Barium Silicate and Sodium Silicate.
  • It is used in the manufacturing of heat resistance glass.
  • Pyrex glass is also called borosilicate glass.
  • It is widely used in microwave utensils and laboratory utensils.


Photochromatic Glass: Photochromatic glass

  • Photochromic glasses are often made by mixing silver chloride (AgCl).
  • Photochromatic glass turns black in sharp shining light thus such glasses are used as light protector and eyes reliever.
  • Due to photochromatic nature (turns black in sharp shining light) this glass is used in making eye lenses and goggles.


Xena Glass:

  • Xena Glass is manufactured from zinc and barium borosilicate.
  • It is soft and good quality of glass.
  • It is used chemical containers and equipment for the scientific purposes.


Crown Glass: crown glasses                

  • It is composed by Potassium Oxide, Barium Oxide and Silica.
  • This is a soda-lime-silica glass.
  • Crown glass generally used in making lenses of eye glasses.


Crookes Glass: crook glasses

  • Crookes glass manufactured by cerium oxide (CiO2).
  • This glass absorbs the ultraviolet rays (UV) from the sunlight.
  • It is used in making lenses of goggles.


Quartz Glass: quartz glasses-                  

  • Quartz glass is made by melting silica.
  • It is used in making bulb of ultraviolet lamp, container of chemical reagents, laboratories equipment etc.


Bulletproof Glass: bulletproof    

  • Mostly bullet-resistant glass is made of polycarbonate, acrylic or glass-clad polycarbonate.
  • Protection level depends on the glass material used, how it is manufactured, as well as its thickness.
  • Bulletproof glass is used in security purpose such as windows of buildings that require such security, jewelry stores, military and private vehicles etc.


Color of Glasses:

During the process of preparation of glasses its various components or constituents (in the molten or fused state) are change (replaced) or added to make glasses become colored.

Color of glasses Substances used to coloring the glass
Green Ferrous Oxide or Sodium Chromate.
Glitter red Cuprous Oxide, Cadmium Sulphide
Red Cuprous
Deep Blue Cobalt Oxide
Fluorescent Yellow Ferric Salt or Sodium Uranet
Green and green yellow Potassium dichromate
Brownish black Carbon

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