Advertisements
Advertisements
Question
Explain concept with example/explain with the help of a balanced equation.
Roasting
Advertisements
Solution
- The process of heating of sulphide ores strongly in excess of air to convert it into respective oxide is called roasting.
- For example, zinc sulphide is heated strongly in excess of air to convert it to zinc oxide.
\[\ce{\underset{\text{Zinc sulphide}}{2ZnS_{(s)}} + 3O_{2(g)} -> \underset{\text{Zinc oxide}}{2ZnO_{(s)}} + \underset{\text{Sulphur dioxide}}{2SO_2↑}}\]
APPEARS IN
RELATED QUESTIONS
How is manganese extracted from manganese dioxide, MnO2? Explain with the help of an equation.
Name two metals which occur in nature in free state as well as in combined state.
Explain given equation, what happens when ZnCO3 is heated in the absence of air?
Name the metal which is extracted from haematite ore.
Name two ores of zinc. Write the names of the chemical compounds present in them and give their chemical formulae.
An important ore of zinc metal is:
(a) calamine
(b) cuprite
(c) pyrolusite
(d) haematite
Aluminum is used in thermite welding:
write reaction for process?
Define the following term.
Mineral
The following questions relate to the extraction of aluminium by electrolysis.
Explain why it is necessary to renew the anode periodically.
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
Sulphide ores : Roasting : : Carbonate ores : _______
Find the odd one out and give its explanation.
Explain the following reaction with the balanced equation.
Ferric oxide is reacted with aluminium.
Explain in brief types of extraction of less reactive metals according to their reactivity.
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
An alloy is
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
