Carbon is a non-metal but it is more reactive than some metals. This means that some metals can be extracted from their metal oxides using carbon. This works for zinc, iron, tin, lead and copper. Copper is the least reactive of these five metals.

Reactivity and extraction method

electrolysis

There are 3 main methods of extracting metals from their ore. They are reduction of the ore with carbon, reduction of the molten ore by electrolysis, and reduction of the ore with a more reactive metal.

The method used to extract a metal from its ore depends upon the stability of its compound in the ore, which in turn depends upon the reactivity of the metal. Reduction with carbon is often used to extract these metals and requires less energy to reduce them to extract the metal.

High reactive metals such as aluminium, calcium and sodium are extracted from their ores by the electrolytic reduction. These highly reactive metals cannot be reduced by using carbon as it is less reactive. In this method the electric current is passed through the ores to get the pure metals.

electrolytic reduction processes

Alkali metals cannot be prepared by electrolysis of their chlorides in aqueous solution.

The residue from desulfurization and denitrification of exhaust gas treatment process with pyrolusite ore as absorbent is regarded as a potential source of iron and manganese.

tungsten

silver

Silver is commonly extracted from the powdered ore by smelting or chemical leaching. This separates the silver and gold. Silver is also produced during the electrolytic refining of copper and by application of the Parkes process on lead metal obtained from lead ores that contain small amounts of silver.

aluminum

Role of NaCN in the extraction of silver (Ag) is to do the leaching of Ag ore in the presence of air from which the silver is obtained later by replacement.

-In the extraction of silver (Ag), the role of NaCN is to do leaching of Ag ore in the presence of air where the silver is obtained by replacement. Ag is oxidized to Ag+ which reacts with CN− formed during leaching.

The use of molten cryolite as a solvent reduces some of the energy costs involved in extracting aluminium by allowing the ions in aluminium oxide to move freely at a lower temperature.

(i) Role of NaCN in the extraction of gold is to do the leaching of gold ore in the presence of air from which the gold is obtained later by replacement.

(i) Role of NaCN in the extraction of gold is to do leaching of gold ore in the pressence of air from which the gold is obtained later by replacement.

(i) Gold is treated with a dilute solution of NaCN in the presence of air. Au is oxidized to Au+ which thenn combines with CN- ions to form its soluble complex. Thus, the role of NaCN in the extraction of gold from its ore is that it helps in the formation of a soluble complex.

Solution 1. Coke reduces the iron oxide to molten iron metal. Also, coke, when burnt in the blast furnace, supplies the heat required for carrying out the extraction of iron from its oxide.

Blowing oxygen forces impurities (oxides, silicates, phosphates, etc.) to react with flux to form slag or escape through the top of the furnace as fumes. Flux (limestone) acts as the chemical cleaning agent, absorbing the iron impurities and leaving behind molten steel.

When launched, Coca-Cola’s two key ingredients were cocaine and caffeine. The cocaine was derived from the coca leaf and the caffeine from kola nut (also spelled “cola nut” at the time), leading to the name Coca-Cola.

Beverage giant Coca-Cola will stop selling about 200 brands soon, cutting its offerings in half. Tab, Zico, and Odwalla have been publicly axed, with more to come, the company said on an earnings call.

4. It originally contained 9 milligrams of cocaine per glass. ”Ingredients from the coca leaf are used, but there is no cocaine in it and it is all tightly overseen by regulatory authorities,” a Coca-Cola spokesperson confirmed to the paper at the time.

Coca-Cola, the world’s best-selling soft drink, once contained cocaine, and it is still flavored with a non-narcotic extract from the coca, the plant from which cocaine is derived.

Coca-Cola is not just a catchy name. When first launched, one of the cola’s key ingredients was coca leaves, the plant that cocaine is derived from. Though the company removed cocaine from the carbonated concoction over 100 years ago, coca leaves are actually still used to flavor Coke.

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