General Principles and Processes of Isolation of Elements (Metallurgy) questions

507 published questions with worked solutions.

• Extraction of metal from the ore cassiterite involves [IIT JEE 2011]
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• The mass of carbon anode consumed (giving only carbon dioxide) in production of 270 kg of aluminium metal from bauxite by the...
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• During the electrolysis of cryolite, aluminium and fluorine are formed in molar ratio
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• Which one of the following ores is best concentrated by froth-floatation method? [UP SEE 2007]
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• In the electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to the charge in order to [AMU 2006]
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• Carbon cannot be used in the reduction of Al_2O_3 because [Manipal 2010]
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• Purification of alumina takes place by [BCECE 2007]
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• Roasted tin stone ore after washing with water is known as [Manipal 2008]
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• The ratio of Fe_2O_3 and Al, in thermite is [BITSAT 2007]
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• Bauxite ore is made up of Al_2O_3 + SiO_2 + TiO_2 + Fe_2O_3. This ore is treated with conc. NaOH solution at 500K and 35 bar...
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• In alumino thermic process, Al is used as [OJEE 2009]
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• When Al is added to KOH solution
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• In purification of bauxite by Hall's process
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• In extraction of aluminium the electrolyte is
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• For purification of alumina, the modern processes most useful when (i) the impurity present is a lot of iron oxides and (ii) the...
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• The function of fluorspar in the electrolytic reduction of alumina dissolved in fused cryolite (Na_3AlF_6) is
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• In electrolysis of aluminium oxide which of the following is added to accelerate the process
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• Purification of aluminium done by electrolytic refining is known as
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• Aluminium is not used in
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus
• Aluminium vessels should not be washed with materials containing washing soda since
  JEE Main · Chemistry · General Principles and Processes of Isolation of Elements (Metallurgy)
  Not in JEE Main or NEET syllabus

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