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

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?

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?

Certain metals can be obtained in the ultrapure state by heating with iodine and then decomposing the metal iodide at a much higher temperature. This method is known as

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

The anode mud in the electrolytic refining of silver contains:

In electrorefining of metals, the anode is made of

In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with? (AIPMT 2012)

The liquation process is used for the purification of

The zone-refining process for purification of metals is based on

Which of the following pair is incorrectly matched?