I need help on Question 2. A certain sample was analyzed by proton NMR and found

Question

I need help on Question 2.

A certain sample was analyzed by proton NMR and found to consist of three isomeric indoles (indole A has a boiling point of 113 degree C; indole B has a boiling point of 164 degree C; indole C has a boiling point of 99 degree C). Rank these compounds in order of relative GC retention times (longest GC retention time first). Which one of the following statements is correct? Under otherwise identical GC conditions hexane should have a longer GC retention time that pentane Under otherwise identical GC conditions hexane should have a shorter GC retention time that pentane Under otherwise identical GC conditions hexane and pentane should have the same GC retention time

Explanation / Answer

The compounds having high boiing points have higher retention times

so here Hexane has higher boiling point than pentane so hexane has higher retention time than pentane .

SO A is the answer .

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