Question

Use the information below to fill in the charts on the 1st screenshot and then answer the questions on the 2nd screenshot.

UNKNOWN #: 399

2,4-dinitrophenylhydrazine Test: solution remains colorless

Fehling’s Test: solution remains colorless

Lucas test: solution became cloudy immediately when reagent was added

Tollen’s test: solution remains colorless

Iodoform Test: solution remains colorless

Bordwell-Wellman Test: no rxn was observed

UNKNOWN #: 499

2,4-dinitrophenylhydrazine Test: solution changed to a yellow-orange color with some precipitation

Fehling’s Test: solution changed to a dark red precipitate

Lucas test: no rxn was observed

Tollen’s test: a silver mirror film appeared inside the test tube

Iodoform Test: no rxn was observed

Bordwell-Wellman Test: no rxn was observed

Use the symbol to indicate a positive reaction and the symbol (X) to indicate a negative reaction and a (-) if a test was not

QUESTIONS: What reagent would you use to distinguish between the following pairs of compounds? Indicate what you would observ

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