Advertisements
Advertisements
प्रश्न
Explain the term of Metallurgy .
Advertisements
उत्तर
. Metallurgy: The various processes involved in the extraction of metals from its ores and refining is called metallurgy.
The major steps involved for the extraction of a metal from its ore are:
(i) Concentration of ores (or enrichment of ore)
(ii) Conversion of concentrated ore into metal
(iii) Refining (purification) of impure metal
APPEARS IN
संबंधित प्रश्न
Why are alkali metals kept in kerosene oil?
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is a more reactive metal.
Give the effect of heat on their: nitrates
Explain the following terms:
smelting
What do you observe when hydrogen is passed over heated copper oxide?
`ZnCO_3`
..............................
`2NaNO_3`
......................
`2AgNO_3`
...........................
How is it removed?
Which metal is used for:
lithographic plates for printing
Name a metal which forms a liquid alloy at ordinary temperature.
The following is a sketch of an electrolytic cell used in the extraction of aluminium :
(a) What is the substance of which the electrode A and B are made?
(b) At which electrode (A or B) is aluminium formed?
(c) What are the two aluminium compounds in the electrolyte C?
(d) Why is it necessary for electrode B to be continuously replaced?
Match the columns.
| Group A | Group B |
| 1. ZnS | a) Copper Sulphide |
| 2. HgS | b) Bauxite |
| c) Cinnabar | |
| d) Zinc blend |
Cassiterite is a copper ore.
Write the molecular formulae of the following compound.
Stannic oxide
Draw a neat and labelled diagram for Froth Floatation Process.
Explain concept with example/explain with the help of a balanced equation.
Gangue
Observe the figure and name and explain in brief the following method:

A process of extracting metals from aqueous solutions of their salts using suitable reducing agents is called ______
After partial roasting, the sulphide of copper is reduced by ______.
Calcination is used in metallurgy for the removal of?
