The reducing agent used in thermite process is ___________.
1. Carbon
2. Aluminium
3. Iron
4. Sodium

Carbon reduction process is not commercially applicable for which of the following set of oxides to extract the respective metal?

Assertion :$A{l}_2{O}_3$ is converted into $Al$ by reduction with carbon.
Reason :Carbon (graphite) has greater affinity for oxygen than aluminium.

What happens when iron(III) oxide is heated with aluminium powder ? 

In which furnace the smelting is done?

Which of the following is correct processes ?

In order to obtain 1 tonne of aluminium, 4 tonnes of bauxite, 150 kg of sodium hydroxide and 600 kg of graphite is required. The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (III) oxide, Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
When bauxite is treated with sodium hydroxide solution, what happens to 
(i) the aluminium oxide
(ii) the iron (III) oxide

Pb is a very important element of carbon family. It forms a number of compounds which are very useful in industries. The process of removal of base metals (Cu, Sn, Bi, As) from lead is called:

Write short note on:
Autoreduction

Select correct statement: