19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature? (NEET 2021)
Identify the correct statement from the following: (NEET 2020)
Which of the following has maximum iron content? (AIIMS 2019)
Identify the incorrect statement. (Odisha NEET 2019)
Which one is malachite from the following? (NEET 2019)
Aluminium is extracted from alumina (Al2O3) by electrolysis of a molten mixture of (AIPMT 2012)
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with? (AIPMT 2012)
The correct order of the abundance of the elements in earth’s crust is (AIMPT 2011)
Which of the following pairs of metals is purified by van Arkel method? (AIPMT 2011)
The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag. (AIPMT 2011)
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)