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Classification of dyes according to their application
Direct dyes:
this type of dyes can be directly applied to the fiber, both vegetable and animal, by dipping in hot aqueous solution of the dye. This type of dyes is most significant for those fabrics that can form hydrogen bonds, that is for rayon, wool, silk, cotton and nylon. Congo and Martius yellow red work as direct dyes. Instances are: Martius yellow, congo red.
its preparation
An element has the electronic configuration 1s 2 , 2s 2, 2p 6 , 3s 2 , 3p 2 . Its valency electrons are: (1) 6 (2) 2 (3) 3 (4)4 Ans: 4
I have this chemistry assignment. It basically says, "study and make a report on any two types of electrochemical cells". What do I do? I have no idea so please, I need some help.
Elimination reactions - Organic Reaction Elimination reactions are generally the opposite of addition reactions and include the removal of the two groups (usually, one being a
Dyes Dye is a synthetic and natural colouring matter that is employed in solution to stain materials particularly fabrics. All the coloured substances are not dyes. A coloured
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