Question 1: An analytical separation technique based on the differences in volatility of compounds. O Separation by extr

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Question 1: An analytical separation technique based on the differences in volatility of compounds.
O Separation by extraction
O Separation by precipitation
O Chromatographic separation
O Separation of species by distillation
Question 2: Complete the sentence. All of the following are common carrier gases from gas chromatography,
EXCEPT:
O nitrogen
O argon
O helium
O carbon dioxide
O oxygen