Which metal is extracted by the reduction of its oxide with coke?

Which metal is extracted by the reduction of its oxide with coke?

For example, the common ores of iron are both iron oxides, and these can be reduced to iron by heating them with carbon in the form of coke.

Why is coke used in the extraction of iron?

Answer : The role of coke in the extraction of iron from its oxides is that it reduces the iron oxide to molten iron metal. Coke also when burnt in the blast furnace, supplies the heat required for carrying out the extraction of iron from its oxide.

What happens when iron oxide is heated with coke?

Step 1 – Hot air (oxygen) reacts with the coke (carbon) to produce carbon dioxide and heat energy to heat up the furnace. In this reaction, the iron(III) oxide is reduced to iron, and the carbon is oxidised to carbon dioxide.

What is coke in metal extraction?

Coke is a grey, hard, and porous fuel with a high carbon content and few impurities, made by heating coal or oil in the absence of air—a destructive distillation process. It is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges when air pollution is a concern.

What is the role of coke and limestone in the extraction of iron?

The main role of limestone in extraction of iron is to decomposes in hot furnace and form the calcium oxide. Iron is extracted from its ore, haematite, in a blast furnace. The ore is fed into the top of the furnace along with coke and limestone. The limestone decomposes in the hot furnace, forming calcium oxide.

Why aluminium is not extracted by the reduction of its oxide?

Explanation: Some metals, such as aluminium, are so reactive that their oxides cannot be reduced by carbon. Aluminum is too high in the electrochemical series (reactivity series) i.e. it is a stronger reducing agent than carbon and therefore it cannot be extracted from its ore using carbon reduction.

What element is coke made of?

carbon
coke, solid residue remaining after certain types of bituminous coals are heated to a high temperature out of contact with air until substantially all of the volatile constituents have been driven off. The residue is chiefly carbon, with minor amounts of hydrogen, nitrogen, sulfur, and oxygen.

How is iron extracted from iron oxide?

Iron is extracted from iron ore in a huge container called a blast furnace. The oxygen must be removed from the iron(III) oxide in order to leave the iron behind. Reactions in which oxygen is removed are called reduction reactions.

What is coke made of?

Carbonated water – Approximately 90% of Coca-Cola is water. The carbonated part is purified carbon dioxide, which gives the drink its “bubbles” or “fizz”. Sugar – Coca-Cola Classic’s sweet taste (and also some of its mouthfeel) comes from sugar. Coca-Cola Zero Sugar and Diet Coke are sugar free.

How is limestone used in extraction?

Limestone is also used to remove impurities from the blast furnace when making iron. The impurities are mostly silicon dioxide (also known as sand). Molten calcium silicate is less dense than the molten iron so it floats on top of the iron and can easily be removed.

Why is limestone added during reduction of ore?

It is added as a neutralizing agent for acidic water before its discharge. Sludge treatment: Lime is widely used to coagulate and to stabilize sludge in the sludge treatment units.

How is aluminum extracted from aluminum oxide?

Extraction of aluminium Aluminium ore is called bauxite . The bauxite is purified to produce aluminium oxide, a white powder from which aluminium can be extracted. The extraction is done by electrolysis. The ions in the aluminium oxide must be free to move so that electricity can pass through it.