Class XII Chemistry Projects-CBSE 2014-Interesting

Class XII Chemistry Projects-CBSE 2013-Interesting

Chemistry Projects For Class 12th CBSE

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Chemistry Projects on Dyes

Dyes are colored substances which adhere to the surface of materials and are used to give color to paper, food stuffs, and various textiles such as cotton, wool etc.Chemically a dye contains…….
1) APPARATUS
2) CHEMICALS USED

Preparation Of WHITE
LIGHT GREEN
OXFORD BLUE
YELLOW …Dyes
 
3)RESULT

 

Dyes are colored substances which adhere to the surface of materials and are used to give color to paper, food stuffs, and various textiles such as cotton, wool etc.

Chemically a dye contains.

Some groups such as azo, anthraquinone which is responsible for the color of the dye.

Some groups such as-COOH, NHSSO3H which make the dye stick to the fabric by formation of some salt.

The dye fabrics appear to be colored because a particular dye absorbs radiation of some specific wave lengths from the visible region of electromagnetic radiation that fall on its surface. The remaining radiations of light are reflected. For example. If a dye absorbs the light in the wavelength region. Corresponding to red, then it would appear green which is the complementary color or red.

1) APPARATUS

Funnel, distilled water, filter paper, mortar.

2) CHEMICALS USED

White, sodium carbonate, lead nitrate, lead chromate.

Light green, copper sulphate, sodium hydrogen carbonate.

Oxford blue, phthalic anhydride, urea hydrated copper (II) chloride, ammonium or sodium molybdate.

Yellow, Potassium chromate, lead nitrate.

 

 

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Further Reading:
http://en.wikipedia.org/wiki/Chemistry
http://en.wikipedia.org/wiki/Projects
http://en.wikipedia.org/wiki/Cbse

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Posted by: Prateek on October 5, 2011


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