action of alkali Flashcards
1
Q
what are the reagents used?
A
10% NAOH (SODIUM HYDROXIDE)
1% BAOH (BARIUM HYDROXIDE)
2
Q
what is the purpose of the test?
A
detect reducing sugars
know how strong and weak base react with carbohydrates
3
Q
what color is produced if positive reaction?
A
black-brown char
4
Q
what color is produced if negative reaction?
A
no color change
5
Q
what are the samples?
A
glucose, fractose, galactose
6
Q
color and odor produced in NaOH
A
brown-black char
burnt sugar smell
7
Q
color and odor produced in BaOH
A
light brown char
less burnt sugar smell
