Chemical Process
Plasticisers are added to paints to

Increase atmospheric oxidation
Make it corrosion resistant
Give elasticity & prevent cracking of the film
Make glossy surface

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

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
Gives higher conversion efficiency

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Chemical Process
Nylon 66 is so named because the

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

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