Sentence Examples

  • Baeyer in 1890, by heating alizarin with fuming sulphuric acid for 24-48 hours at 35-40° C., obtained a product, which after treatment with caustic soda gave a sulphuric acid ester of quinalizarin, and this after acidification and boiling was converted into quinalizarin (Alizarin Bordeaux) or tetra-oxyanthraquinone.
  • Meta-dinitrobenzene is formed by the direct nitration of nitrobenzene with fuming nitric acid, the product being poured into water and recrystallized from dilute alcohol.
  • The hydrides of the halogens are all colourless, strongly fuming gases, readily soluble in water and possessing a strong acid reaction; they react readily with basic oxides, forming in most cases well defined crystalline salts which resemble one another very strongly.
  • The chlorides of the nonmetallic elements are usually volatile fuming liquids of low boilingpoint, which can be distilled without decomposition and are decomposed by water.
  • It is a nearly colourless fuming liquid of unpleasant smell, which can be solidified to a mass of crystals melting at-6° C. It dissociates into the trichloride and chlorine when heated.

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