19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The chemical composition of ‘slag’ formed during the smelting process in the extraction of copper is
The two most abundant metals in the earth crust are:
The maximum temperature that can be achieved in blast furnace is: (NEET 2021)
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)
In the extraction of copper from its sulphide ore, the metal is formed by the reduction of Cu2O with (JIPMER 2018)
Identify the ore not containing iron. (UP CPMT 2012)
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)
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)
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
The ore having two different metal atoms is (AIPMT 2006)
330 350K Ni 4CO Ni CO -> 450 470K Ni CO Ni 4CO -> The above reactions are of the purification of Ni by