Chemical Process
Saponification value/number of an oil or fat is a measure of its

Insoluble fatty acid content
Degree of unsaturation of the fatty acids present in it
Fatty acid content
Average molecular weight

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

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