Chemical Process
H₂S is scrubbed from refinery gases by absorption using

Ethanol amine
Dilute H₂SO₄
Tri-butyl phosphate
Chilled water

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Chemical Process
Fluorescent dyes are added in detergents to

Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics
None of these
Attain distinctiveness from other brands
Act as tarnish inhibitor for metals like German silver

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