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

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Chemical Process
One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to

Reduce the viscosity of the syrup
Improve the rate of crystallisation of sugar
Adjust the pH of the syrup
Remove the coloring matter from the syrup

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