Chemistry
Grade-10
Easy
Question
Select the alloy that is used for developing castings for the firearm chamber.
- Brass
- Wood’s metal
- Bronze
- Amalgam
Hint:
Casting is a manufacturing process in which a liquid material is usually poured into a mold, which contains a hollow cavity of the desired shape, and then allowed to solidify.
The correct answer is: Wood’s metal
- Casting is a manufacturing process in which a liquid material is usually poured into a mold, which contains a hollow cavity of the desired shape, and then allowed to solidify.
- Wood's metal is used for making a casting of firearm chambers by the maker of guns.
- It is a mixture of 50% bismuth, 25% lead, 12.5% tin, and 12.5% cadmium and it melts at a temperature of 158° Fahrenheit (70° Celsius).
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| Column-I |
Column-II |
| 1. Iron pyrites | i) ZnS |
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Column-II |
| 1. Iron pyrites | i) ZnS |
| 2. Pitchblende | ii) CaSO42H2O |
| 3. Dolomite | iii) FeS2 |
| 4. Zincblende | iv) CaCO3MgCO3 |
| 5. Gypsum | v) U3O8 |
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