Test For Cho

Question 1

Brick red color obtained after heating CHO in

Answer 1

Fehling solution

Question 2

Test for reducing sugars

Answer 2

Fehling test

Question 3

Test for CHO

Answer 3

Molish test

Question 4

CHO + α-naphthol + conc H2SO4 gives

Answer 4

Purple color( molisch)

Question 5

Purple ring forms immediately

Answer 5

Soluble CHO

Question 6

Purple ring forms after shaken

Answer 6

Insoluble CHO

Question 7

🔥+sugar+phenyl hydrazine +HCl+sodium acetate +acetic acid 🔜yellow crystals under microscope

Answer 7

Osazone (sugar derivatives)

Question 8

Glu and fruc both firm same osazone call

Answer 8

Glucosazone

Question 9

Needle shape osazone

Answer 9

Glucosazone

Question 10

Rhombic plate shape osazone

Answer 10

Galactosazone

Question 11

Sun flower shape osazone

Answer 11

Maltosazone

Question 12

Powder puff/hedge hog shape osazone

Answer 12

Lactosazone

Question 13

Saliwanoff test( resorcinol)

Answer 13

Ketones

Question 14

What color appear after resorcinol +🔥+equal quality of conc hcl+ketone

Answer 14

Rose color

Question 15

Sol + 🔥+ equal volume of HCL+ phloroglucinol🔜 red color

Answer 15

Pentoses

Question 16

Dissolve in acetic acid containing iron(3) chloride, then transferred into a test tube surface containing h2so4 at the junction btn 2 liquid reddish brown ring formed which gradually turns blue

Answer 16

Keller kiliani test for deoxy sugars

Question 17

CHO +🔥+phosphoric acid , a disk of filter paper moisten by drops of 10%sol of aniline mixed with 10% acetic acid is put on the mouth of the test tube, the bottom test tube is heated for 30-60 seconds, a pink or red color stain appear onthe paper

Answer 17

Furfural test