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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.
Which one of the following groupings represents a collection of isoelectronic species: (1) NA +, Ca 2+ , Mg 2+ (2) N3, F - , Na + (3) be, Al 3+ , Cl -
Melting point - physical charterstics of monocarboxylic acids (a) The melting points of carboxylic acids do not change smoothly from one member to other member. (b) The melt
There are numerous methods for shielding metals from corrosion (iron from rusting). Some of these methods are being discussed as follows: 1. Barrier protection; in this me
GEOCHEMISTRY The chemical processes taking place in the crust are especially important as they have build ores, concentrated mineral deposits that are exploited industrially
how to draw 3D stereoisomers for a compound?
can we reduce r-cn to primary ammines using fe/hcl
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Where is tin obtained? Ans) Tin is obtained in several places tin is found mainly in the ore cassiterite, which is originate in Malaysia, Bolivia, Thailand, and Nigeria.
Natural rubber and its examples
Define Composition of individual phase in phase diagram–three phase? A binary system with three phases has only one degree of freedom and cannot be represented by an area on a
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