Q.1
Sulfide ores contain around _____ copper.
  • a) 9 – 10%
  • b) 8 – 12%
  • c) 4 – 5%
  • d) 0.5 – 2%
Q.2
The first process in extraction of an element from ore is typically ______
  • a) roasting
  • b) electrolysis
  • c) crushing
  • d) smelting
Q.3
Which of the following techniques are used in the extraction of copper?
  • a) Refining, down process
  • b) Smelting, vacuum pump
  • c) Roasting, refining
  • d) Roasting
Q.4
___________ is a sulfide ore of copper.
  • a) Chalcocite
  • b) Cuprite
  • c) Magnesite
  • d) Azurite
Q.5
Sulfide ores are typically processed through a technique known as __________
  • a) cathode
  • b) pyrometallurgy
  • c) hydrometallurgy
  • d) zarconsis
Q.6
Copper ores typically contain less than _________ of copper.
  • a) 0.15%
  • b) 0.2%
  • c) 1%
  • d) 0.4%
Q.7
Oxide ores of copper cannot be processed using hydrometallurgy.
  • a) True
  • b) False
Q.8
Smelting is done to eradicate unwanted materials like ___________ to the fullest extent possible.
  • a) copper
  • b) copper and gangue minerals
  • c) sulfur
  • d) sulfur and gangue minerals
Q.9
The final output after processing of copper ores to be purified produces around ____________ pure copper.
  • a) 100%
  • b) 45%
  • c) 99.9%
  • d) 86%
Q.10
It is impossible to recycle used copper products.
  • a) True
  • b) False
0 h : 0 m : 1 s