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प्रश्न
Name the main constituent metal in the following alloy:
Brass
उत्तर
Brass
Cu (60 - 70%)
Zn (30 - 40%)
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संबंधित प्रश्न
Select the process from the following which matches the given description.
(calcination, roasting, pulverisation, smelting)
Heating of the ore in the absence of air to a high temperature.
State the main components of the following alloys:
Duralumin
Name an alloy of lead used in electrical wiring or electrical work in joining metals.
A tapping vessel opens in a tank-like container that is tapering on the lower side. The tank has an outlet for water on the upper side and a water inlet on the lower side. Finely ground ore is released in the tank. A forceful jet of water is introduced in the tank from lower side and gangue particles and pure ore are separated by this method.
- The above description is of which gravitation separation method?
- Draw a labelled diagram of this method.
Name one metal occurring as a : Oxide ore
Give composition and uses of the following alloys. Mention the reason for its use.
Brass
List 1 contains the meta ls I alloys (1, 2, 3, 4, 5 ) and list 2 contains their uses (A, B, C, D, E).
| List 1 Metal/Alloy |
List 2 Uses |
| 1. Aluminium | A. Steel making |
| 2. Lead | B. aeroplane wings |
| 3. Brass | C. galvanizing |
| 4. Iron | D. radiation shield |
| 5. Zinc | E. electricaI fittings |
Copy and complete the following table, write down the correct letter against the numbers representing metals. An answer may be used only once. The first has been done for you.
| Metal | 1 | 2 | 3 | 4 | 5 |
| Use | B |
Aluminium powder is used in thermite welding because
Name the following :
An ore of zinc containing its sulphide.
The ore which can be concentrated by magnetic separation.
