In a phytochemical screening, the formation of an orange or reddish-brown precipitate after adding Dragendorff’s reagent indicates the presence of which metabolite?

The Shinoda test (Mg + conc. HCl) is the standard qualitative test for which group of compounds, typically producing a pink to magenta color?

Which metabolite group is known as 'Nature’s Bandages' because they precipitate proteins to form a protective layer over wounds and treat diarrhea?

During a Bornträger test, the ammonia layer turns bright pink or red. This result is positive for which metabolite?

Which test involves suspending yellow sodium picrate paper over a crushed plant sample to detect the release of toxic Hydrogen Cyanide (HCN) gas?

A student observes a bright blue fluorescence under UV light at 365 nm in an alcoholic plant extract. After adding NaOH, the fluorescence intensifies. Which compound is likely present?

The Keller-Kiliani test produces a reddish-brown ring at the junction and a blue-green color in the upper acetic acid layer. What specific component of a cardiac glycoside is being detected?

Which class of tannins produces a 'blue-black' precipitate when reacted with Ferric Chloride solution?

What is the structural difference between a 'Cardenolide' and a 'Bufadienolide' cardiac glycoside?