19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Out of the following metals that cannot be obtained by electrolysis of the aqueous solution of their salts is
Heating pyrites to remove sulphur is called
Which of the following metals cannot be extracted by the carbon reduction process?
Heating with carbon in absence of air is known as :
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
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with? (AIPMT 2012)
Aluminium is extracted from alumina (Al2O3) by electrolysis of a molten mixture of (AIPMT 2012)
Identify the ore not containing iron. (UP CPMT 2012)
Roasting of sulphides give the gas X as a by-product. This is a colourless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic…
The metal oxide which cannot be reduced to metal by carbon is (Karnataka NEET 2013)
The process of converting hydrated alumina into anhydrous alumina is called (AIPMT 2013)
The ore of aluminium is (UP CPMT 2013)
Identify the incorrect statement. (NEET Odisha 2015)
Which one is malachite from the following? (NEET 2015) (a) 2 Cu OH (b) Fe O (c) CuCO .Cu OH (d) CuFeS
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with (NEET 2016)
The electrometallurgical process (electrolysis of fused salts) is employed to extract
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)