Chemical Process
Nicotine is

Both A and B
Neither A nor B
Obtained by treating by-products of the tobacco processing industry
A volatile alkaloid

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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

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

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