Advertisements
Advertisements
प्रश्न
Explain concept with example/explain with the help of a balanced equation.
Roasting
Advertisements
उत्तर
- 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
संबंधित प्रश्न
How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
Explain given equation, what happens when ZnCO3 is heated in the absence of air?
What iron compound is present in haematite ore? Also write its chemical formula.
Which of the following is an iron ore?
(a) cinnabar
(b) calamine
(c) haematite
(d) rock salt
The two metals which can be extracted just by heating their sulphides in air are:
(a) sodium and copper
(b) copper and aluminium
(c) potassium and zinc
(d) mercury and copper
Give reasons, why aluminum is used in:
In aluminiothermy
State one observation for each of the following :
Copper sulphate solution is electrolysed using copper electrodes.
Compare the process of calcination and roasting.
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Name:
The allotrope of the non-metal carbon which conducts electricity.
Arrange the metals of copper, iron, magnesium, sodium and zinc in the decreasing order of reactivity.
Name a non- metal that has a metallic luster and sublimes on heating.
Answer the following question :
What is the difference between calcination and roasting.
Iron is _______.
If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?
Aluminium oxide is _______ oxide.
In Electrolytic reduction of alumina, Anode : _______ : : Cathode : Graphite lining
Explain the following reaction with the balanced equation.
Ferric oxide is reacted with aluminium.
Explain the following reaction with the balanced equation.
Zinc carbonate is heated strongly in limited supply of air
Electrical wires have a coating of an insulting material. The material, generally used is
