Chemical Process
Nitrile rubber is produced by the polymerisation of

Acrylonitrile and styrene
Acrylonitrile and butadiene
None of these
Isobutylene and isoprene

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

None of these
It decomposes on further increasing the temperature
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)

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