Understanding the Selivanov's Test

What is the primary purpose of the Selivanov's Test?

• To identify keto sugars with at least five carbon atoms

• To measure the acidity of a solution

• To detect the presence of proteins

• To determine the boiling point of a liquid

Which of the following is a common example of a keto sugar?

• Glucose

• Galactose

• Fructose

• Mannose

Who devised the Selivanov's Test?

• Theodore Selivanov

• Dmitri Mendeleev

• Louis Pasteur

• Marie Curie

What is the main component of the Selivanov's reagent?

• Sulfuric acid

• Resorcinol and hydrochloric acid

• Sodium chloride

• Ethanol

What happens to keto sugars during the Selivanov's Test?

• They undergo oxidation

• They are rapidly dehydrated

• They form a precipitate

• They change to a blue color

What color indicates a positive result for keto sugars in the Selivanov's Test?

• Blue

• Green

• Cherry red

• Yellow

Why do aldo sugars give a slower reaction in the Selivanov's Test?

• They have more carbon atoms

• They lack a ketone group

• They are less reactive with the reagent

• They are more soluble

What is the expected result for a disaccharide like sucrose in the Selivanov's Test?

• No color change

• Formation of a precipitate

• Immediate deep red color

• Delayed cherry red color

Which sample acts as a negative control in the Selivanov's Test demonstration?

• Distilled water

• Glucose solution

• Sucrose solution

• Fructose solution

What is the role of the water bath in the Selivanov's Test procedure?

• To dissolve the sugars

• To cool the samples

• To evaporate the solvent

• To maintain a constant temperature