Chemistry Question Bank

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 …

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

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:

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?

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

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?

Which of the following reactions represents the self- reduction process? (a) (b) (c)

Thomas slag is