A. Difference between roasting and calcination
B.Name the anode the cathode and electrolyte used in the electrolytic refining of impure copper.
C. Show the formation of sodium oxide by the transfer of electrons between constituting atoms.
Answers
Answer: sulphide Ores are converted into oxides by heating strongly in the presence of excess air this process is known as roasting.. the carbonate Ores are changed into oxides by heating strongly in Limited air this process is known as calcination
Explanation:
Answer:-
A) Roasting:-Roasting is a process of heating of sulphide ore to a high temperature in presence of air.
Calcination:-Calcination is a process in which an ore is heated in the absence of air or air might be supplied in limited quantity.
B) The process of electrolysis is used to purify impure copper with the help of current. Anode: The anode used for this process is made up impure. Cathode: The cathode used for the electrolysis is pure copper sheets. Electrolyte: Copper sulphate solution is used as an electrolyte in this process.
C)
