Chemical Process
High purity nitrogen is used in

Making protective gas (95% N₂ + 5% H₂) for annealing of cold rolled steel strip coils
Fire fighting purposes
Both A & B
Neither A nor B

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Chemical Process
Enzymes are

Catalyst for temperature sensitive reactions
Derived from living organisms
All of these
Proteins with high molecular weight (around 10, 000)

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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
Remove the coloring matter from the syrup
Reduce the viscosity of the syrup
Adjust the pH of the syrup

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