Non-Ferrous Extractive Metallurgy Mid - II, November - 2014

1.The following metal is used in pyro techniques and photography _______
  • Magnesium
  • Titanium
  • Uranium
  • Nickel
Answer: A
2.Serpentine is an ore of _______
  • Titanium
  • Uranium
  • Nickel
  • Magnesium
Answer: D
3.In Dow process __________ is obtained from sea water.
  • MgCl2
  • MgO
  • MgCO3
  • Mg2SiO4
Answer: A
4.In pidgeon process Fe-Si contains ______- percentage of silicon.
  • 25
  • 75
  • 15
  • 85
Answer: B
5.For production of Titanium ________ route is attractive.
  • Oxide
  • Halide
  • Sulphates
  • Nitrates
Answer: B
6.The first successful commercial process of Titanium production was by ______
  • Kroll
  • Hunter
  • Hall
  • Hebber
Answer: B
7.Alkali leaching of uranium ores is not suitable in case they contain high amounts of ____
  • CaCO3
  • MgCO3
  • Gypsum
  • Na2CO3
Answer: C
8.In Mond’s process ____________ is used.
  • CO
  • CO2
  • Carbon
  • Sulphur
Answer: A
9.The chief ore of Tungsten is ___________
  • Calamine
  • Rutile
  • Wolframite
  • Azurite
Answer: C
10.In cyanidation process for gold _________ is used.
  • ZnCN
  • NaCN
  • KCN
  • HCN
Answer: B
11.The Pidgeon process is carried out at a temperature of ______________
Answer: 1100°C to 1200°C
12.For precipitation of magnesium hydroxide _____________ is used in Dow’s process.
Answer: Lime or Ca(OH)2
13._____________ electrolysis is preferred for magnesium.
Answer: Fused salt
14.____________ furnace is used in extraction of magnesium by Pidgeon process.
Answer: Retort
15.The reduction chamber in Kroll’s process is flushed with ___________ to eliminate __________
Answer: H2 , O2
16.______________ process is used for purification of titanium metal.
Answer: Vanarkel or Iodide
17.Pentlandite is a mineral of _____________
Answer: Nickel
18._____________ is the first metal recognized as a nuclear fuel.
Answer: Uranium
19.Uranium goes into solution when it is present in the _____________ state.
Answer: Hexavalent
20.In cementation process, gold is precipitated by adding ____________ to cyanide solution.
Answer: Zinc (Zn)