19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Cupellation process is used in the metallurgy of: (AIPMT 2011)
The metal oxide which cannot be reduced to metal by carbon is (Karnataka NEET 2013)
In the extraction of silver, Ag2S is dissolved in: (AIPMT 2009)
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)
Blister copper is: (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 ->
The magnetite ore is (AIPMT 2007)
The ore having two different metal atoms is (AIPMT 2006)
Consider the following reaction at 1000ºC. (AIPMT 2006) I. - Zn(s)+ O (g) ZnO(s);ΔG°=-360KJmol -> II. - C(gr)+ O (g) CO(g);ΔG°=-460KJmol -> Choose the correct statement at 1000ºC
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)
Which of the following reactions taking place in the blast furnace during extraction of iron is endothermic? (RPMT 2006)
In the context of the Hall - Heroult process for the extraction of Al, which of the following statements is false?
Aluminium is extracted by the electrolysis of
Cryolite is:
The major role of fluorspar (CaF2) which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite (Na3AlF6) is
330 350K Ni 4CO Ni CO -> 450 470K Ni CO Ni 4CO -> The above reactions are of the purification of Ni by
Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true? (RPMT 2007)
Electrolytic reduction of alumina to aluminium by the Hall-Heroult process is carried out
The process of converting hydrated alumina into anhydrous alumina is called (AIPMT 2013)
In extractive metallurgy of zinc, partial fusion of ZnO with coke is called
In extractive metallurgy of zinc, partial fusion of ZnO with coke is called
Extraction for zinc from zinc blende is achieved by
Aluminium is not present in which of the following mineral?
Which of the following minerals contains calcium as well as magnesium?
Of the following metals, the one which cannot be obtained by the electrolysis of the aqueous solution of its salt is