Chemical Process
Dacron (or terylene) fibres as compared to nylon's fibres have

Poorer dyeability
All of these
Better heat & acid resistant properties
Poorer resistance to alkalis

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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 is very corrosive at elevated temperature
None of these
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)

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