Flavonoids

Flavonoids occur in

• both free state or as glycosides

• free state only

• as glycosides

• as flavone

If flavonoids occur as glycosides, which will be (). 

• as O and C glycosides

• as N and H glycosides

• as rhamnosides

• phenol glycosides

Flavonoids are chemically

• 2-phenylbenzopyrones

• phenyl 2-benzopyrones

• phenyl benzo 2- pyrones

• pheny benzoic acid derivates

• Flavone

• Isoflavone

• Flavonol

• Flavanone

Neo-flavonoids are derived from

• 2-phenyl-1,2-benzopyrone

• 4-phenyl-1,2-benzopyrone

• 4-phenyl-2-benzopyrone

• 2-phenyl-2-benzopyrone

Flavonoids are classified based on the

• Groups

• β-ring location

• Group and β-ring location

• Sugar moiety

The glycosidic linkage of flavonoid is normally located at position of

• 3

• 7

• 3 or 7

• 5 or 7

Shinoda’s test is also called as

• cyanidin reaction

• Wilson’s reaction

• Antimony penta reaction

• Lead subacetate reaction

Shinoda’s test is carried out by reacting

• HCL solution & Ag turnings

• HCL solution & Mg turnings

• H₂SO₄ solution & Copper turnings

• H₂SO₄ solution & Zn turnings

Flavonoid means

• yellow like coloured compounds

• Flavoured compounds

• Strong aromatic and intense coloured compounds

• Volatile like substance