Organic Analysis

Question 1

For unsaturation

Answer 1

Bayer’s - pink colour disappears
Bromine test - reddish brown dissapears

Question 2

For alcohols

Answer 2

Ester test - fruity smell
CAN - wine red

Question 3

For phenol

Answer 3

Blue litmus test.
Neutral FeCl3 - violet
Phtallic anhydride - phenolphthalein (dark pink)

Question 4

For aldehyde

Answer 4

Tollens and fehlings
Silver mirror and red ppt
Schiffs reagent - pink

Question 5

Ketones

Answer 5

SNP - red
m-dintrobenzene - purple

Question 6

For carboxylic acid

Answer 6

Ester test - fruity smell
NaHCO3 - brisk effervescence
Blue litmus

Question 7

Fehlings and benedict is specially for

Answer 7

Alliphatic ald

Question 8

Tollens is specially for

Answer 8

Aldehydes only

Question 9

NaHCO3 is also for phenols. True or false?

Answer 9

False (not basic enough)

Question 10

For amines

Answer 10

Carbylamine
Azo dye (ß naphtol) - scarlet pink

Question 11

Lassainges test for N, S, N+S and X

Answer 11

N - Fe4[Fe(CN) 6]3.xh2o - prussian blue
S - [Fe(CN)5NOS]4- - violet
- PbS - black
S+N - [Fe(SCN)]2+ - blood red
AgCl - white soluble
AgBr - yellow
AgI - dark yellow