Related InterviewSolutions

• Why is the extraction of copper form pyries more difficult then that from its oxide ore through reduction?
• How is leaching carried out in the case of low grade copper ores?
• At a site, low grade copper ores are avilable and Zinc and iron scraps are also avilable . Which of the two scraps would be more suitable for reducing the leached copper ore and why?
• Copper can be extracted by hydrometallurgy but not Zinc -explain.
• Write any two ores with formulae of the following metals: (a) Aluminium (b) Zinc (c) Iron (d) copper
• Give the uses of a) cast iron b) wrought iron c) Nickel steel d) Stainless steel
• Between C and CO, Which is a better reducing agent for ZnO?
• Suggest a condition under which magnesium could reduce alumina.
• The Value of `DeltaG^(@)` for the formation of `Cr_(2)O_(3)` is `-"540KJ mol"^(-1)` and that of `Al_(2)O_(3)` is `-827"KJ mol"^(-1)`. Is the reduction of `Cr_(2)O_(3)` possible with Al ?
• The reaction, `Cr_(2)O_(3)+2AlrarrAl_(2)O_(3)+2Cr(DeltaG^(Theta)=-421KJ)` is the thermodynamically feasible as is apparent from the Gibbs energy value . Why does it not take place at rom temperture?