Tag: production of metals

Quizzes (5) Questions (161)

Questions Related to production of metals

Multiple choice chemistry production of metals refining of metals basics of metallurgy basic metallurgical processes

Mark the correct option:
a) Pure metal from the electrolyte is deposited at the anode.
b) The soluble impurities go into the solution.
c) Insoluble impurities known as anode mud.

  1. a, b

  2. b, c

  3. a, c

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

On passing the current through the electrolyte, pure metal from the anode dissolves into the electrolyte. An equivalent amount of pure metal from electrolyte is deposited on the cathode.

Multiple choice chemistry production of metals refining of metals basics of metallurgy basic metallurgical processes

Refining of metal is:

  1. purification of metal

  2. concentration of metal

  3. conversion into oxides

  4. none of above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Refining consists of purifying an impure material, in this case, a metal. It is to be distinguished from other processes such as smelting and calcining in that those two involve a chemical change to the raw material, whereas in refining, the final material is usually identical chemically to the original one, only it is purer.

Multiple choice chemistry production of metals refining of metals basics of metallurgy basic metallurgical processes

The electrolyte used for copper refining is an acidic solution of:

  1. copper chloride

  2. copper sulphide

  3. copper sulphate

  4. impure copper
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The purest copper is obtained by an electrolytic process, undertaken using a slab of impure copper as the anode and a thin sheet of pure copper as the cathode. The electrolyte is an acidic solution of copper sulphate.