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

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Chemical Process
Nylon 66 is so named because the

Average degree of polymerisation of the polymer is 1966
Number of nitrogen atoms between two carbon atoms are 6
Number of carbon atoms between two nitrogen atoms are 6
Polymer was first synthesised in 1966

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