Chemical Process
Vulcanisation of rubber

Decreases its tensile strength
Converts its plasticity into elasticity
Increases its ozone & oxygen reactivity
Increases its oil & solvent resistance

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Chemical Process
During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as

It decomposes on further increasing the temperature
Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced)
None of these
It is very corrosive at elevated temperature

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