(LAB) CARBOHYDRATE TESTS: COLOR OBSERVATIONS

Question 1

deep blue color (+ starch)
violet (+ dextrin)
no blue or red-brown color (+ gum arabic)
dark brown color (+ agar-agar)
(yellow = NONE)

Answer 1

Iodine Test (5)

Question 2

brick red precipitate (blue solution = NONE)f

Answer 2

Fehling’s Test

Question 3

brick red precipitate (blue solution = NONE)be

Answer 3

Benedict’s Test

Question 4

brick red precipitate (blue solution = NONE)ba

Answer 4

Barfoed’s Test

Question 5

mahogany red color (yellow = NONE)

Answer 5

Picric Acid Test

Question 6

red/cherry red color (yellow = NONE)

Answer 6

Seliwanoff’s Test

Question 7

brown color with caramel like odor (colorless= NONE)

Answer 7

Moore’s Test

Question 8

formation of a purple/red ring (colorless= NONE)

Answer 8

Molisch’s Test

Question 9

brick red precipitate (black precipitate = NONE)tr

Answer 9

Trommer’s Test

Question 10

crystal formation (precipitate) (no crystal formation = NONE)

Answer 10

Mucic Test

Question 11

blue to green solution (otherwise = NONE)

Answer 11

Bial’s Test

Question 12

bluish-green complex (colorless= NONE)

Answer 12

Anthrone Test

Question 13

dark brown to black precipitate (no reaction = NONE)

Answer 13

Nylander’s Test