Chemical Process
One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to

Reduce the viscosity of the syrup
Adjust the pH of the syrup
Improve the rate of crystallisation of sugar
Remove the coloring matter from the syrup

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Chemical Process
Fluorescent dyes are added in detergents to

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

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