Chemistry Question Bank

The process of converting hydrated alumina into anhydrous alumina is called (AIPMT 2013)

The metal oxide which cannot be reduced to metal by carbon is (Karnataka NEET 2013)

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…

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)

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)

Which of the following minerals does not contain iron?

During the extraction of iron, slag produced is

Which of the following mixtures is called matte?

Blister copper is obtained in

In the extraction of iron, Fe2O3 is reduced by

Which of the following is also known as “Fools gold”?

In the equation, 4M+8CN– + 2H2O + O2-> 4 [M(CN)2]– + 4OH–, the metal M is

Ultrapure silicon, used to make semiconductors, is obtained by the

Impure nickel is purified by

Which method of purification is represented by the following equation? Ti+2I TiI Ti+2I K K -> ->

The van Arkel method for purification of metals involves the conversion of the metal into a

Which of the following metals is refined by the van Arkel process?