Chemistry Question Bank

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

Copper and lead are mainly extracted by

Silver can be separated from lead by:

The mineral carnallite contains

Cassiterite is an ore 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:

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

In the extraction of Fe from Fe2O3, the reducing agent is

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 …

Which of the following is a sulphide ore?

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

Copper is extracted from sulphide ore using the method:

The cyanide process is used for the extraction of

Of the following metals, the one which cannot be obtained by the electrolysis of the aqueous solution of its salt is

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

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

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

Impure nickel is purified by

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

In electrorefining of metals, the anode is made of

The anode mud in the electrolytic refining of silver contains:

The liquation process is used for the purification of

The distillation process (under reduced pressure) is used for the purification of