Qualitative Test for Carbohydrates

What is the general formula for carbohydrates?

• Cn(H2O)n

• Cn(H2O)n+1

• Cn(H2O)n-1

• Cn(H2O)n/2

Which category of carbohydrates cannot be further hydrolyzed to simpler units?

• Monosaccharides

• Disaccharides

• Polysaccharides

• All of the above

Which monosaccharide is abundant in germinating barley?

• Glucose

• Fructose

• Maltose

• Sucrose

Which disaccharide is also known as cane sugar or beet sugar?

• Maltose

• Glucose

• Fructose

• Sucrose

Which polysaccharide functions as a structural unit?

• Cellulose

• Starch

• Dextrin

• Glycogen

Which chemical test is used to detect the presence of carbohydrates based on the formation of furfural and its derivatives?

• Molisch Test

• Bial's Orcinol Test

• Seliwanoff's Test

• Tollen's Test

What is the purpose of the Molisch test?

• To detect the presence of pentoses

• To differentiate ketohexoses from aldohexoses

• To determine the reducing property of sugars

• To detect the presence of carbohydrates

Which test is used to differentiate ketohexoses from aldohexoses?

• Molisch Test

• Bial's Orcinol Test

• Seliwanoff's Test

• Phenylhydrazine Test

Which test is a very sensitive test done under mildly alkaline conditions?

• Benedict's Test

• Barfoed's Test

• Phenylhydrazine Test

• Tollen's Test

What is the purpose of Barfoed's test?

• To detect the presence of pentoses

• To differentiate ketohexoses from aldohexoses

• To determine the reducing property of sugars

• To distinguish monosaccharides, disaccharides, and oligosaccharides