Vulcanisation of natural rubber on the lab bench involves heating with:
ASulphur, which cross-links chains for strength and elasticity
BOxygen, which oxidises the rubber to make it harder
CHydrogen, which saturates double bonds in the rubber backbone
DWater, which softens the rubber for tyre manufacture in lab
Answer & Solution
Correct answer: A. Sulphur, which cross-links chains for strength and elasticity
Vulcanisation: rubber + sulphur (heat) forms cross-links between chains, giving strong elastic rubber.
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