Advertisements
Advertisements
Question
Explain the concept of Roasting.
Advertisements
Solution
In roasting process, the sulphide ores are strongly heated in air to transform them into oxides. In this process, sulphide ores are oxidized to form metal oxides and sulphur dioxide gas.
APPEARS IN
RELATED QUESTIONS
In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?
Name the following:
The property possessed by metals by which they can be beaten into sheets.
Name one metal which is extracted by reduction with carbon.
Name two metals which are always found in combined state.
Name one ore of aluminium. Name the aluminium compound present in this ore and write its chemical formula.
Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
Which metal is extracted from calamine ore?
The major ore of aluminium is known as:
(a) cinnabar
(b) calamine
(c) bauxite
(d) pyrolusite
Zinc blende ore can be converted into zinc oxide by the process of:
(a) roasting
(b) hydrogenation
(c) chlorination
(d) calcination
Give the principles of electromagnetic separation.
Give reasons, why aluminum is used in:
In aluminiothermy
Name the following:
Two metals which are found in the free or native state.
Define the term:
Slag
What is meant by concentration of ores?
Complete the following by selecting the correct option from the choices given:
The metal which does not react with water or dilute H2SO4 but reacts with concentrated H2SO4 is _________
Zinc blende is converted to oxide by ______ process.
Explain the following reaction with the balanced equation.
Sodium aluminate reacts with water
Oxides of moderately reactive metals like Zinc, Iron, Nickel, Tin, Copper, etc. are reduced by using:
Electrical wires have a coating of an insulting material. The material, generally used is
Two ores A and B were taken. On heating ore A gives CO2 whereas, ore B gives SO2. What steps will you take to convert them into metals?
