Hydrometallurgy

Q.

Cooper can be extractted by hydrometallurgy but not zinc Explain.

Q. What is meant by term pyrometallergy?

Q. Explain pyrometallurgy.

Q. What are the main steps of pyrometallurgy?
1. Calcination
2. Roasting
3. Smelting
4. All of the above

Q. In the equation, $4M+8C{N}^{-}+2H_{2}O+O_2\to 4\left[M\right(CN{)}_2{]}^{-}+4O{H}^{-}$. Identify the metal M.

1. Copper
2. Iron
3. Gold
4. Zinc

Q.

Given below are some statements contrasting Hydrometallurgy and pyrometallurgy. Which of the following are the advantages of Hydrometallurgy (leaching)?

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. Earthly particles in an ore are removed from heavier metal ore using water in:

1. levigation
2. hydraulic washing
3. leaching
4. gravity separation

Q.

Write the equations for the reaction of Zinc with each of the following:

Sodium hydroxide solution

Q. Which of the following is not a method of refining of metals?

1. Smelting
2. Electrolysis
3. Poling
4. Liquation

Q. Match the metal from List 1 with the method of purification form List 2

Q. Bauxite is extracted by :

1. Baeyer's process
2. Serpek's process
3. Hall's process
4. All of the above

Q. The process employed to concentrate an ore is called at the beneficiation process.

1. True
2. False

Q.

Given below are some statements contrasting Hydrometallurgy and pyrometallurgy. Which of the following are the advantages of Hydrometallurgy (leaching)?

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.

Given below are some statements contrasting Hydrometallurgy and pyrometallurgy. Which of the following are the advantages of Hydrometallurgy (leaching)?

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.