Chemistry Question Bank

Which of the following is a sulphide ore?

The cyanide process is used for the extraction of

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

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

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

Cassiterite is an ore of

Copper and lead are mainly extracted by

Silver can be separated from lead by:

The mineral carnallite contains

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

The electrometallurgical process (electrolysis of fused salts) is employed to extract

Extraction for zinc from zinc blende is achieved by

In extractive metallurgy of zinc, partial fusion of ZnO with coke is called

In extractive metallurgy of zinc, partial fusion of ZnO with coke is called

Which of the following is a fluoride ore?

During the electrolytic reduction of aluminium, the carbon anodes are replaced from time to time because

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

Electrolytic reduction of alumina to aluminium by the Hall-Heroult process is carried out

Cryolite is:

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

Aluminium is extracted by the electrolysis of

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

330 350K Ni 4CO Ni CO → 450 470K Ni CO Ni 4CO → The above reactions are of the purification of Ni by

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

Which of the following reactions taking place in the blast furnace during extraction of iron is endothermic? (RPMT 2006)