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
All of these
Has a longer life and is not poisoned by arsenic

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Chemical Process
Pick out the true statement pertaining to water treatment.

Application of activated carbon reduces the temporary hardness of water
Normally, the turbidity is removed by adding a coagulent prior to sedimentation
Activated carbon can be used for taste & odour control without subsequent filtration
Slow sand filters can remove colour completely

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