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Tests of phenol - Hydrocarbon
(a) Aqueous solution of phenol gives a violet colouration with a drop of ferric chloride.
(b) Aqueous solution of phenol gives a white precipitate of 2, 4, 6-tribromophenol with bromine water.
(c) Phenol generates Liebermann's nitroso reaction.
(d) Phenol combines along with phthalic anhydride in presence of conc. to make phenolphthalein that gives pink colour with alkali, and required as an indicator.
(e) Along with sodium hypochlorite and ammonia, phenol gives blue colour.
The postulate of Bohr theory that electrons jump from one orbit to the other, rather than flow is according to : (1) The quantisation concept (2) The wave nature of elect
Types of Elimination reactions Elimination reactions are divided into two general categories, (A) α - elimination reactions or 1, 1-elimination reactions. (B) β - elimin
A covalent bond between two atoms is formed by which of the following: (1) Electron nuclear attraction (2) Electron sharing (3) Electron transfer (
1. The feed to an ammonia synthesis reactor is 25% (lbmole) nitrogen with the balance hydrogen. The flow rate is 3000 kg/h at 65°C and 95 bar. Calculate the flow rate of nitrogen
Q. Show the Reactions of Boric Oxide? Boric oxide, B 2 0 3 , is the principal oxide of boron. It is also known as boron trioxide, boron sesquioxide and boric anhydride. It is p
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Number of protons, neutrons and electrons in the element 231/89 y is: (1) 89, 231, 89 (2) 89, 89, 242 (3) 89, 142, 89 (4) 89, 71, 89 Ans: 89, 142, 89
Q. Give neutralization reactions of salts? Ans. A salt is an ionic compound composed of an anion from an acid and a cation from a base. Sodium chloride, NaCl, and potassiu
why nnitroalkanes are highly polor compounds*
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