Chemistry Question Bank

Which of the following benefaction processes is used for the mineral, Al2O3.2H2O?

Which of the following elements is present as the impurity to the maximum extent in the pig iron? (AIPMT 2011)

Cupellation process is used in the metallurgy of: (AIPMT 2011)

Which of the following diagram explain extraction of metal from metal oxide: (RPMT 2010)

The minimum voltage required to electrolyse alumina in the Hall-Heroult process is (Given, o f G Al O 1520kJ mol ; o f G CO 394kJmol ) (AIIMS 2009)

In the cryolite CaCl2 is added to: (AIPMT 2009)

The process of extracting Ti from TiCl4 in presence of Mg is called: (RPMT 2009)

In the extraction of silver, Ag2S is dissolved in: (AIPMT 2009)

Which metal has a greater tendency to form metal oxide? (RPMT 2008)

Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true? (RPMT 2007)

Among the metals Cr, Fe, Mn, Ti, Ba and Mg, the one that cannot be obtained by reduction of metal oxide by aluminium is (RPMT 2007)

The magnetite ore is (AIPMT 2007)

Blister copper is: (AIPMT 2007)

Sulphide ores of metals are usually concentrated by Froth floatation process. Which one of the following sulphide ores offers an exception and is concentrated by chemical leaching? (AIPMT 2007)

Gº vs T plot in the Ellingham’s diagram slopes downwards for the reaction. (RPMT 2006) (a) Mg+ O MgO -> (b) 2Ag+ O Ag O -> (c) C O CO -> (d) CO O CO ->

Which of the following reactions taking place in the blast furnace during extraction of iron is endothermic? (RPMT 2006)

Chemical leaching is useful in the concentration of:

Wolframite (FeWO4), present as an impurity in cassiterite (SnO2), can be removed by the process of

In the froth-floatation process, the sulphide ores are concentrated by mixing the ore with

In the froth-floatation process, the ore particles float because

Sulphide ores are generally concentrated by the

Concentration of ores is not done by the

Silicon is the main constituent of

The ore of calcium which contains phosphorus is

The metal which mainly occurs as oxide ore in nature is: