Advertisements
Advertisements
Question
Explain the concept of Calcination.
Advertisements
Solution
In the calcination process, carbonate ores are strongly heated in a limited supply of air to transform them into oxides. In this process, carbonate ores decompose to form a metal oxide and carbon dioxide gas.
APPEARS IN
RELATED QUESTIONS
Define the Ore.
Metallic oxides of zinc, magnesium and copper were heated with the following metals.
| Metal | Zinc | Magnesium | Copper |
| Zinc oxide | – | – | – |
| Magnesium oxide | – | – | – |
| Copper oxide | – | – | – |
In which cases will you find displacement reactions taking place?
Name the following:
The property possessed by metals by which they can be beaten into sheets.
How is zinc extracted from its carbonate ore (calamine)? Explain with equations.
How are the less reactive metals (which are quite low in the reactivity series) extracted? Explain with the help of an example.
What iron compound is present in haematite ore? Also write its chemical formula.
The metal which can be extracted simply by heating the cinnabar ore in air is ______.
Zinc blende ore can be converted into zinc oxide by the process of ______.
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
Name the following:
The process in which an ore is heated in air so that oxygen gets added to it to form the oxides.
Complete the incomplete statement with missing word:
Metals form positive ions while non- metals ______.
Compare the properties of a typical metal and a non- metal on the basis of the following:
(a) electronic configuration
(b) nature of oxides
(c) oxidizing or reducing action
(d) conductivity of heat and electricity
Calcium, copper, lead, aluminium, zinc, chromium, magnesium, iron.
Choose the major metals from the list given above to make the following alloys:
(a) Stainless steel
(b) brass
Usually ______ ores are subjected to ______ which is done in the absence of air.
Name the process used for the enrichment of sulphide ore.
Write the name.
Strongly heating carbonate ores in insufficient air -
Explain the following reaction with the balanced equation.
Dry aluminium hydroxide is ignited at 1000 °C
Explain concept with example/explain with the help of a balanced equation.
Calcination
Observe the following diagram and write answers.
- Name the method.
- Write anode reaction and cathode reaction.
- Why fluorspar and cryolite are added in the mixture?
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore
