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Glycosides and Glycones

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Questions and Answers

Which glycoside subgroup contains thiocyanate group?

Flavone glycosides

Cyanogenic glycosides

Aldehyde glycosides

Thiocyanate glycosides (correct)

What is the property of Steroidal glycosides in relation to heart failure?

Laxative properties

For heart failure (correct)

Expectorant properties

Antioxidant properties

Which plant is a source of Flavone glycosides?

Orange (correct)

Digitalis Purpurea

Foxglove

Rhubarb

What is the result of the test for Anthraquinone glycosides?

PINK / RED in ammonical layer (C) Signup and view all the answers

Which test is used to detect Saponin glycosides?

Drop blood on slide + mixed with few drops of extract (A) Signup and view all the answers

What is the characteristic of Aldehyde glycosides?

Bitter taste (D) Signup and view all the answers

What is a glycoside composed of?

A sugar molecule bonded to a non-sugar group via a glycosidic bond (D) Signup and view all the answers

What is a characteristic of a glycone?

Soluble in water due to the presence of -OH (A) Signup and view all the answers

What type of glycoside is formed when a sugar molecule bonds with a phenol or –OH group of aglycone?

O-glycoside (C) Signup and view all the answers

What is a characteristic of a cardiac glycoside?

Has a steroid-like structure (D) Signup and view all the answers

What type of glycoside is formed when a sugar molecule bonds with the –NH group of aglycone?

N-glycoside (A) Signup and view all the answers

What is a characteristic of saponin glycosides?

Foams when shaken in water (A) Signup and view all the answers

What is the result of mixing a flavonoid glycoside extract with zinc dust and hydrochloric acid?

A flavonoid glycoside is formed (B) Signup and view all the answers

What is the purpose of adding sodium picrate solution and sodium carbonate solution to the neck of a flask using a cork?

To trap sulphuric acid (B) Signup and view all the answers

What is the result of adding a few drops of ferric chloride solution to a thiocyanate glycoside extract?

A yellow color is formed (A) Signup and view all the answers

What is the purpose of adding acetic anhydride and concentrated sulfuric acid to a steroidal glycoside extract?

To detect the presence of steroidal glycosides (A) Signup and view all the answers

What is the result of adding chloroform and concentrated sulfuric acid to a steroidal glycoside extract?

A yellow ring is formed at the junction of two liquids (C) Signup and view all the answers

What is the result of adding Tollens' reagent to an aldehyde glycoside extract?

A silver mirror is formed (D) Signup and view all the answers