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Published on: 03/07/2021
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Questions + Answers key
Take MCQ Science Test1.
Write the uses of iron.
2.
Write the physical properties of iron.
3.
Write the ores of Iron and their formula.
4.
Uses of Copper.
5.
Write the physical properties of copper.
1.
(i) Pig iron (Iron with 2 -4.5% of Carbon): it is used in making pipes, stoves, radiators, railing, manhole covers and drain pipes.
(ii) Steel (Iron with < 0.25%) : It is used in the construction of buildings, machinery, transmission cables and T.V. towers and in making alloys.
(iii) Wrought Iron (Iron with 0.25% — 2%) : It is used in making springs, anchors and electromagnets.
2.
(i) It is lustrous metal, greyish white in colour.
(ii) It has high tensility, malleability and ductility.
(iii) It can be magnetized.
3.
Hematite - Fe2O3.
Magnetite- Fe3O4.
Tron pyrite - FeS2.
4.
(i) It is extensively used in manufacturing electric cables and other electric appliances.
(ii) It is used for making utensils, containers, calorimeters and coins.
(iii) It is used in electroplating.
(iv) It is alloyed with gold and silver for making coins and jewels.
5.
Copper is a reddish brown metal with high lustre, high density and high melting point (1356°C).
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
