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| Q. |
In vulcanisation process, rubber can be hardened by adding - |
| A. | Nitrogen |
| B. | Silicon |
| C. | Sulphur |
| D. | Alcohol |
| Answer» C. Sulphur | |
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Explanation: In order to give more strength and more elasticity, natural rubber is heated with sulphur or sulphur compounds at 150°Ctemperature. Vulcanized rubber has good tensile strength. |
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