Advertisements
Advertisements
प्रश्न
Define roasting.
उत्तर
Roasting is the process of heating concentrated ore to a high temperature in the presence of air.
संबंधित प्रश्न
Fill in the following blank with suitable word:
Bronze is an alloy of copper and .........
Define the term ore.
Explain given equation, what happens when ZnCO3 is heated in the absence of air?
The metal which can be extracted from the bauxite ore is:
(a) Na
(b) Mn
(c) Al
(d) Hg
Distinguish between ‘roasting’ and ‘calcination’. Which of these two is used for sulphide ores and why?
Name the following:
The substance added to get rid of gangue in the extraction of metal.
Which one of the following is not true of metal :
Metal will have 1 or 2 or 3 electrons in their valence shell.
Write the name.
The process of strong heating of carbonate ores in insufficient air–
Explain the following reaction with the balanced equation.
Zinc oxide is treated with carbon
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
