Chemical Process
Dry ice (solidified CO₂) is used for the

Liquefaction of permanent gases
Storage & shipment of frozen foods and ice-creams
None of these
Liquefaction of natural gas

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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

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

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