Occurrence of Metals

In the electrolysis of alumina, cryolite is added to _____.

The zinc oxide formed after the process of calcination or roasting undergoes reduction to obtain or extract zinc.

In the roasting process, when sulphide ore is heated strongly in the presence of air, it is converted into metal oxide and releases the gas:

In the calcination process, when carbonate ore is heated strongly in the absence of air, it is converted into a metal oxide and releases carbon dioxide. 

What is the difference between calcination and roasting?

Cinnabar is heated in air which converts it into:

What is the chemical formula of Cinnabar?

Extraction of mercury from cinnabar is achieved by:

Manganese metal is extracted from manganese dioxide by a reduction process by making use of:

The elements or compounds that occur naturally in the earth's crust are known as _____.

The carbonate ores are changed into oxides by heating strongly in the limited air. This process is known as _____.

The sulphide ores are converted into oxides by heating strongly in the presence of excess air. This process is known as _____ .

The extraction of metals from their ores and then refining them for use is known as _____ .

What is the common method for extraction of metals from their oxides?

Which of the following metal is moderately reactive?

The earthy impurities associated with minerals used in metallurgy are called _____.

A mineral is known as ore if the metal

An electrolytic cell consists of
(i) positively charged cathode
(ii) negatively charged anode
(iii) positively charged anode
(iv) negatively charged cathode

$\mathrm{E}$ is an element that's ore is rich in ${\mathrm{E}}_2{\mathrm{O}}_3$. ${\mathrm{E}}_2{\mathrm{O}}_3$ is not affected by water. It forms two chlorides, ${\mathrm{ECl}}_2$ and ${\mathrm{ECl}}_3$ The element $\mathrm{E}$ is

Name one metal which is extracted by:
Reduction with heat alone.