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Index (S)
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SD - SF
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SS - ST
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Moment of truth
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The fastest man-made object that ever leave the Earth is the New Horizon spacecraft, launched in January 2006, and attained a speed of more than 36000 mph. |
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slaked lime Chem.
Also known as hydrated lime or common name for calcium hydroxide. It is formed by adding water to quicklime (calcium oxide). It is a white crystalline powder slightly
soluble in water to give a clear weak alkaline solution called lime water. The solution is commonly used to test for the presence of carbon dioxide which gives a white precipitate
of calcium carbonate. Slaked lime is also used in sugar refining, mortar, plaster and soil treatment.
smelting Min. Ext.
The metallurgical process of separating a metal from its ore by heating the ore to a high temperature with a reducing agent such as carbon coke. For iron, smelting usually occurs in a blast furnace
but for other metals, it can occur in a reverberatory furnace or electric furnace.
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