Chemical Process
The chamber process is

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

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Chemical Process
Vulcanisation of rubber

Increases its oil & solvent resistance
Increases its ozone & oxygen reactivity
Converts its plasticity into elasticity
Decreases its tensile strength

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Chemical Process
In the manufacture of H₂SO₄, vanadium catalyst as compared to platinum catalyst

Gives higher conversion efficiency
Handles lower SO₂ content gas (7 -10% SO₂), thus increasing the capital cost of the plant
Has a longer life and is not poisoned by arsenic
All of these

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