Processes of Isolation of Elements

Read the following statements and choose the set of correct statements :
(A) Chrome steel is used for cutting tools and crushing machines.
(B) The fine dust of aluminium is used in paints and lacquers.
(C) Copper is used for reduction of al...

Match List - I with List - II

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The reaction that does NOT take place in blast
furnace between 900 K to 1500 K temperature
range during extraction of iron is :

Match List - I with List - II.

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Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature?

The maximum temperature that can be achieved in blast furnace is :

Identify the correct statement from the following :

Which one is malachite from the following?

Considering Ellingham diagram, which of the
following metals can be used to reduce
alumina?

Extraction of gold and silver involves leaching with CN\(-\) ion. Silver is later recovered by

Match items of Column I with the items of Column II and assign the correct code :

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''Metals are usually not found as nitrates in their ores.'' Out of the following two (I and II) reasons which is/are true for the above observation?
I.  Metal nitrates are highly unstable.
II.  Metal nitrates are highly soluble in water.

In the extraction of copper from its sulphide ore. the metal is finally obtained by the reduction of cuprous oxide with

The metal oxide which cannot be reduced to metal by carbon is

Roasting of sulphides gives the gas X as a byproduct. This is a colourless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic, acts as a reducing a...

Aluminium is extracted from alumina (Al2O3) by electrolysis of a molten mixture of

In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with

Which one of the following is a mineral of iron?

Which of the following elements is present as the impurity to the maximum extent in the pig iron?

Which of the following pairs of metals is purified by van-Arkel method?

The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag.

Sulphide ores of metals are usually concentrated by froth floatation process. Which one of the following sulphide ores offer an exception and is concentrated by chemical leaching?

Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?

The method of zone refining of metals is based on the principle of