Test for lipids: Uses ethanol, Positive result is a cloudy emulsion., Negative result is a colourless mixture., Test for starch: Uses iodine., Goes blue-black for a positive result., Remains orangey-brown if the result is negative., Test for glucose (reducing sugars): Uses Benedict’s reagent., Negative result is a bright blue solution., The most positive result is a brick-red precipitate., Requires heat., Test for proteins: Uses biuret solution., Positive result is a purple solution., Negative result is a blue solution.,

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