The extraction of metals from their ores and then refining them for use is known as ____________.

Academic Chemistry NCERT Class 10

The extraction of metals from their ores and then refining them for use is known as metallurgy.

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Updated on: 10-Oct-2022

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Give the steps involved in the extraction of metals of low and medium reactivity from their respective sulphide ores.
(a) How is the method of extraction of metals high up in the reactivity series different from that for metals in the middle? Why cannot the same process be applied for them? Name and explain the process of extraction of sodium.(b) Draw a labelled diagram of electrolytic refining of copper.
Give reason for the following :Carbonate and sulphide ores are usually converted into oxides during the process of extraction of metals.
(a) Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.(b) How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
How is the method of extraction of metals high up in the reactivity series different from that for metals in the middle? Why can the same process not be applied for them? Name the process used for the extraction of these metals.
Name one method for the refining of metals.
Carbon cannot reduce the oxides of sodium, magnesium and aluminium to their respective metals. Why? Where are these metals placed in the reactivity series? How are these metals obtained from their ores? Take an example to explain the process of extraction along with chemical equations.
Give reasoni. Metals replace hydrogen from dilute acids, whereas non-metals do not.>ii. Carbonate and sulphide ores are usually converted into oxides during the process of extraction.
Which product of coal is used as a reducing agent in the extraction of metals?
What is meant by refining of metals? In the electrolyte refining of metal M, name the cathode, anode and the electrolyte.
During the extraction of metals, electrolytic refining is used to obtain pure metals. (a) Which material will be used as anode and cathode for refining of silver metal by this process? (b) Suggest a suitable electrolyte also. (c) In this electrolytic cell, where do we get pure silver after passing electric current?
(a) Name the metal which is extracted from the ore called ‘rock salt’.(b) Name two ores of zinc. Write the names of the chemical compounds present in them and give their chemical formulae. (c) Explain how, mercury is extracted from its sulphide are (cinnabar). Give equations of the reactions involved. (d) In the electrolytic refining of a metal M, what would you take as anode, cathode and electrolyte? (e) Name any five metals which are purified by electrolytic refining method.
What is meant by refining of metals? Name the most widely used method of refining impure metals produced by various reduction processes. Describe with the help of a labeled diagram how this method may be used for refining of copper.
What is the process of getting curd from milk known as?
The plants that can prepare their own food known as?

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