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10Mining is the process of extracting metals from ores.
Metallurgy includes the study of properties and purification of metals.
Grinding is the last step in metallurgy.
Gangue refers to the impurities in ores.
Roasting is used to convert sulphide ores into oxides.
Calcination is done in the presence of air.
Reduction is the process of removing oxygen from metal oxides.
Smelting separates metals from oxides using reducing agents.
Electro-refining produces metals about 99% pure.
Mercury is refined by electro-refining.
Percentage: 0%
Which is the primary step of purifying metal?
What is the first step in metallurgy?
Impurities like mud and sand in ores are called:
The process of strongly heating sulphide ores in air is called:
Calcination is done in the presence of:
Reduction in metallurgy refers to:
Smelting involves:
Which method is used to purify metals like copper?
In electro-refining, impure metal is connected to:
Mercury is purified by:
The process of extracting useful substances and minerals from the earth's surface is called ______.
The science that deals with the production, properties, and purification of metals is called ______.
The first step in metallurgy is ______.
Impurities like mud and sand in ores are called ______.
The process of removing impurities from ores to increase the percentage of metal is called ______.
Strongly heating sulphide ores in air to convert them into oxides is called ______.
Heating carbonate ores in the absence of air to obtain oxides is called ______.
Removing oxygen from metal oxides to obtain metals is called ______.
Heating metal oxides with a reducing agent above melting point to separate metal is called ______.
Purifying metals after reduction to obtain them in pure form is called ______.