Chemistry Question Bank

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

The major role of fluorspar (CaF2) which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite (Na3AlF6) is

Aluminium is extracted by the electrolysis of

In the context of the Hall - Heroult process for the extraction of Al, which of the following statements is false?

Cryolite is:

Which of the following minerals contains calcium as well as magnesium?

The mineral carnallite contains

Silver can be separated from lead by:

Copper and lead are mainly extracted by

Cassiterite is an ore of

Silver is obtained from Na [Ag(CN)2] by reaction with:

In the process of extraction of gold, Roasted gold ore + CN – + H2O -> [X] + HO – [X] + Zn -> [Y] + Au Identify the complexes [X] and [Y]

Which of the following ligands is used to form the complex from which silver is extracted?

The cyanide process is used for the extraction of

Which of the following is a sulphide ore?

Blister copper is refined by stirring molten impure metal with green logs of wood because such a wood liberates hydrocarbon gases (like CH4). This Process X is called .......... and the metal contains impurities of Y …