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

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

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Chemical Process
Nylon 66 is so named because the

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
Number of carbon atoms between two nitrogen atoms are 6

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