Mourlot has shown that aluminium sulphide, zinc sulphide and cadmium sulphide are the only sulphur compounds which can resist the heat of the electric furnace without decomposition or volatilization, and of these aluminium sulphide is the only one which is decomposed by water with the evolution of sulphuretted hydrogen. It may be noticed that the potassium zinc cyanide is useless in gold extraction, for it neither dissolves gold nor can potassium cyanide be regenerated from it. In "cold galvanizing" the zinc is deposited electrolytically from a bath, preferably kept neutral or slightly acid, containing a io% solution of crystallized zinc sulphate, ZnSO 4.7H20. Hydrogen may also be obtained by the action of zinc on ammonium salts (the nitrate excepted) (Lorin, Comptes rendus, 1865, 60, p. 745) and by heating the alkali formates or oxalates with caustic potash or soda, Na2C204+2NaOH = H 2 +2Na 2 CO 3. ); it is soluble in water and has strongly basic properties and an alkaline reaction. The best metals for coinage are gold, silver, platinum, copper, tin, nickel, aluminium, zinc, iron, and their alloys; certain alloys of gold, silver, copper and nickel have the best combination of the required qualities. Another very excellent method of vulcanizing cut sheet goods consists in placing them in a solution of the polysulphides of calcium at a temperature of 140° C. Rubber employed for the manufacture of cut sheets is often coloured by such pigments as vermilion, oxide of chromium, ultramarine, orpiment, antimony, lamp black, or oxide of zinc, incorporation being effected either by means of the masticator or by a pair of rollers heated internally by steam, and so geared as to move in contrary directions at unequal FIG. On this page, you can easily check different meanings of Zinc and can learn to make Zinc sentence in English. Owing to the cost and trouble of weighing a large number of zinc plates, this type of meter fell into disuse. However, you need to apply proper grammar rules in any sentence. The subject is a grammatical term used to describe the nouns, pronouns, and noun phrases that occur before the verb in a sentence. Small up to the beginning of the 19th century, Holywell has increasingly prospered, thanks to lime quarries, lead, copper and zinc mines, smelting works, a shot manufactory, copper, brass, iron and zinc works; brewing, tanning and mineral water, flannel and cement works. The table below gives the average production of zinc, argentiferous lead, iron-pyrites and other ores during the quinquennial period 1901f 905. Pliny explicitly speaks of a mineral Katiµ€ia or cadmic as serving for the conversion of copper into aurichalcum, and says further that the deposit (of zinc oxide) formed in the brass furnaces could be used instead of the mineral. He was involved in oil, z Zinc ores, in the several varieties of carbonates, silicates, oxide, sulphide and sulphate of zinc, have been found in several of the Australian states, but have attracted little attention except in New South Wales, where special efforts are being made successfully to produce a high-grade zinc concentrate from the sulphide ores. thick, and containing 25 to 33% of iron, accompany the zinc ores. Soc., 1880, 37, p. 740) by the action of cyanogen gas on zinc ethyl. It is the centre of the mining district of Upper Silesia, and its population is mainly engaged in such operations and in iron and zinc smelting. Perhaps now you are beginning to understand the importance of trace minerals. Examples of amount of zinc in a sentence, how to use it. Simultaneously Hermann, a German chemical manufacturer, discovered the new metal in a specimen of zinc oxide which had been thought to contain arsenic, since it gave a yellow precipitate, in acid solution, on the addition of sulphuretted hydrogen. A compound sentence with “zinc” contains at least two independent clauses. ইংরেজি - বাংলা Online অভিধান। Providing the maximum meaning of a … A freshly prepared surface of the metal closely resembles zinc in appearance, but on exposure to the air it rapidly tarnishes, becoming yellowish and ultimately grey or white in colour owing to the formation of a surface layer of calcium hydrate. The table below gives the average production of zinc reclamation, disjoin the is. Average production of zinc deficiency in a sentence, how to use it CH CH =H20+C6H4 i ).... Stop it from rusting entire state was valued at $ 127,958 ) of rhodium, iridium and,... Charges with them, and weaving, bobbin-making and pencil-making in Iowa were those lead... 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