Chemical Process
Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.

Mechanical
Sulphate/kraft
Neutral sulphite semi-chemical
Sulphite

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Chemical Process
The chamber process is

A batch process for directly producing high strength (98 to 100%) H₂SO₄
Non-catalytic and operates only on pyrites
None of these
Preferred over contact process for producing 98 to 100% H₂SO₄ and various oleums

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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
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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