I. Choose the correct answer:
1. Which is one of the first metals known and used by man?
a. Iron b. Copper c. Gold d. Silver
2.____ is a rare and precious metal.
a. Limestone b. copper c. Gold d. Silver
3. Which one of the following is used in making electrical batteries?
a. Iron b. Manganese c. Gold d. Diamond
II. Match the following:
1. Metallic Resources -Sedimentary rocks
2. Non Renewable resources – Pure aluminium
3. Limestone – Natural gas
4. Duralumin - Iron
III. Answer the following:
1. Explain Metallic resources?
2. What are the uses of iron?
3. Give a short note on Duralumin?
Answers
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Answer:
ll_sanju_ll
Explanation:
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Answered by
1
Answer:
1. B. Copper
2.C. Gold
3.B. Manganese
III.
1. Are things like Gold, Silver, Tin, Copper, Lead, Zinc, Iron, Nickel, Chromium, and Aluminum
2.It is used to manufacture steel and also used in civil engineering like reinforced concrete, girders etc. Iron is used to make alloy steels like carbon steels with additives such as nickel, chromium, vanadium, tungsten, and manganese.
3.Duralumin is a strong, lightweight alloy of aluminium discovered in 1910 by Alfred Wilm, a German metallurgist. It is relatively soft, ductile and easily workable under normal temperature. The alloy can be rolled, forged and extruded into various forms and products.
Sorry for not answering the II.
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