Occurence of Elements
Occurence of Elements: Overview
The topic discusses the occurrence of metals in the form of ore and minerals. The occurrence of metals in nature is only a part of the process; these metals also have to be extracted. Examples of different element extraction are also discussed here.
Important Questions on Occurence of Elements
Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out
Find the number of native ores out of the given ores:
pyrolusite, chromite, siderite, cassiterite, calamine, argentite, limestone, chalcopyrite.
What are the nitrate ores? Give examples.
The slag formed from the blast furnace during the extraction of iron is used to manufacture high temperature resistant building products.
The slag formed from the blast furnace during the extraction of iron is used to manufacture Portland cement.
Mention few uses of slag formed from the blast furnace during the extraction of iron.
_____ is the process of extraction of metals from their ores.
acts in froth-floatation as a _____.
The ores of Iron ore is /are:
The ores of Aluminium ore is / are:
Name the chief form of occurrence of the Iron in the earth’s crust.
Name the chief form of occurrence of copper in the earth’s crust.
During smelting an additional substance is added which combines with impurities to form a fusible product. Name the substance.
Most abundant metal in the earth's crust is _____
Most abundant element in the earth's crust is _____.
The ore which contains copper and iron both:
Write short notes on the following-
slag
Write short notes on the following-
gangue
Explain the term slag.
What is the difference between minerals and ores?
