Pyrometallurgy

Q.

Which of the following processes is/are pyrometallurgical?

1. Smelting

2. Electrolysis

3. Leaching

4. Roasting

Q. Correct the sentence by adding word(s).
The electrolysis of lead bromide liberates lead and bromine.

Q. Whan methyl chloride react with sodium metal which product is form ?

Q.

Which of the following metals can be refined by pyro refining process?

1. Copper

2. Tin

3. Aluminium

4. Mercury

Q. Mark the correct statements:

1. (i) and (iii)
2. (ii) and (iii)
3. (i) and (ii)
4. (i), (ii) and (iii)

Q. Which of the following metals are refined by liquation refining process?

1. Lead
2. Iron
3. Tin
4. Zinc

Q. Which of the following metals are refined by liquation refining process?

1. Lead
2. Iron
3. Tin
4. Zinc

Q.

Which of the following statements are true?

1. Hydrometallurgy offers excellent chemical selectivity and flexibility than pyrometallurgy

2. Compared to pyrometallurgy, hydrometallurgy requires significantly more floor space, planning and plumbing.

3. Leaching doesn't produce the huge volume of gases that pollute the environment.

4. Temperature involved in hydrometallurgy is much lower than pyrometallurgy.

Q.

Baeyer's process is a pyrometallurgical process.

1. False

2. True

Q. Refining of tin can be done by :

1. cupellation
2. liquation
3. electrorefining
4. poling

Q. Identify the reaction in which a low reactive metal is replaced by a high reactive metal.

1. Corrosion
2. Combination
3. Redox
4. Displacement

Q.

Which of the following statements are true?

1. As compared to pyrometallurgy, hydrometallurgy offers excellent chemical selectivity and flexibility.

2. Hydrometallurgy predominantly involves much lower temperatures than pyrometallurgy.

3. Since Hydrometalurgy is employed at relatively lower temperatures, it involves very dilute solutions and slow reaction rates.

4. Unlike pyrometallurgy, leaching doesn't produce huge volumes of corrosive gases that pollute the environment.

Q. A metal is soft and can be cut with knife. It catches fire when poured over water. When its salt is electrolysed , we get alkali solution and two gases in the ratio 1:1. Explain the reaction and give chemical equations.