Three reagents are added separately to four organic compounds - AQA - A-Level Chemistry - Question 23 - 2019 - Paper 3
Question 23
Three reagents are added separately to four organic compounds.
Which row shows the correct observations?
| Reagent | Sodium hydrogen carbo... show full transcript
Worked Solution & Example Answer:Three reagents are added separately to four organic compounds - AQA - A-Level Chemistry - Question 23 - 2019 - Paper 3
Step 1
Sodium hydrogen carbonate observation for Propan-1-ol
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Answer
Propan-1-ol will produce effervescence when reacted with sodium hydrogen carbonate due to the release of carbon dioxide gas.
Step 2
Acidified potassium dichromate(VI) observation for Propan-1-ol
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Answer
Propan-1-ol will result in an orange solution turning green as it is oxidized to an aldehyde.
Step 3
Tollens' reagent observation for Propan-1-ol
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Answer
No visible change occurs with Tollens' reagent because Propan-1-ol does not reduce it.
Step 4
Overall conclusion
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Answer
Thus, the correct observations correspond to option A: Propan-1-ol with effervescence, orange solution turning green, and no visible change.
