Qualitative Test for Carbohydrates Flashcards
This is a COMMON TEST FOR ALL CARBOHYDRATES larger than tetroses.
A. Fehling’s Test
B. Molisch’s Test
C. Benedict’s Test
D. Iodine Test
B. Molisch’s Test
What does Molisch’s Test perform when the product condenses to a purple form product?
α-naphthol
This forms the REDUCTION TESTS FOR CARBOHYDRATES.
A. Fehling’s Test
B. Molisch’s Test
C. Benedict’s Test
D. Iodine Test
A. Fehling’s Test
As in Fehling’s test, FREE ALDEHYDE or a KETO GROUP in the reducing sugars reduce CuOH in an alkaline medium to red-colored cuprous oxide.
A. Fehling’s Test
B. Molisch’s Test
C. Benedict’s Test
D. Iodine Test
C. Benedict’s Test
Reducing sugars (glucose & lactose) REDUCES SILVER ION in the test reagent to elemental silver.
A. Fehling’s Test
B. Molisch’s Test
C. Benedict’s Test
D. Tolen’s Test
D. Tolen’s Test
This test is used to detect THE PRESENCE OF MONOSACCHARIDE (reducing) sugars in solution.
A. Iodine Test
B. Seliwanoff’s Test
C. Barfoed’s Test
D. Tolen’s Test
C. Barfoed’s Test
It is a color reaction specific for KETOSES when concentrated HCl is added, KETOSES UNDERGO DEHYDRATION to yield furfural derivatives MORE RAPIDLY THAN ALDOSES.
A. Iodine Test
B. Seliwanoff’s Test
C. Barfoed’s Test
D. Tolen’s Test
B. Seliwanoff’s Test
In Seliwanoff’s Test, what does the REAGENT CAUSE the dehydration of ketohexoses?
5-hydroxymethylfurfural
This test is used for the DETECTION OF THE STARCH in the solution.
A. Iodine Test
B. Seliwanoff’s Test
C. Barfoed’s Test
D. Tolen’s Test
A. Iodine Test
What does STARCH CONTAIN produce from a complex of iodine to give the black/blue form?
α-amylose and amylopectin
HCl, when REACTED with PENTOSE SUGARS (such as ribose sugar), forms a FURFURAL DERIVATIVES, and then a reaction with orcinol in the presence of a ferric ion forms a blue-green color compound.
A. Iodine Test
B. Bial’s Test
C. Barfoed’s Test
D. Tolen’s Test
B. Bial’s Test
In Bial’s test, the formation of blue color is the presence of what?
Pentose
MONOSACCHARIDE REACTS WITH PHENYLHYDRAZINE. The sugars that will reduce as an effect of this reaction will result in the?
Formation of Osazones
Product is the corresponding POLYHYDROXY ALCOHOL called?
Sugar alcohol or alditol
It is used as a MOISTURIZING AGENT OF FOOD and COSMETICS and as a sweetening agent in CHEWING GUM.
Sorbitol
