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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 substance is known as a dye if it fulfills the subsequent conditions,
1. It should have an appropriate colour.
2. It may be lasting on the fabric either directly or with the help of mordant.
3. while fixed it must be fast to light and washing, that is it has to be resistant to the action of acids, water and alkalies, majorly to alkalies as washing soda and soap have alkaline nature.
The number of orbitals in the fourth principal quantum number will be: (1) 4 (2) 8 (3) 12 (4) 16 Ans: 16
characteristics of group 13 elements
Reaction with Dehydration of alcohol Reaction with H 2 SO 4 [Dehydration of alcohol]: The removal of water from a compound is termed as dehydration. The sequence of simple deh
Q. Describe Peroxomonosulphuric Acid? It is also known as permonosulphuric acid. It is obtained by the action of chlorosulphuric acid on cold anhydrous hydrogen peroxide :
The shape of d xy orbital will be: (1) Circular (2) Dumb-bell (3)Double dumb-bell (4) Trigonal Ans: Double dumb-bell
diamond is covalent.yet it has high melting point.why?
formula for producer gas
Explain propene In propene, the H 3 C-C bond dipole adds vectorially to the smaller H-C bond dipole; the resultant is smaller than the H 3 C-C bond dipole itself, as th
Nomenclature of Bicyclic compounds Several hydrocarbons and their derivatives include two fused or bridged rings. The carbon atoms are common to both rings are known as bridge
general methods of preparation of ethanol
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