Viva 2 Flashcards
Which organic compound is identified in 2,4 DNP test
Aldehyde or ketones (carbonyl grp)
What happens when an aldehyde or ketone is heated with 2,4 DNP reagent
Crystalline orange ppt is formed
Mention one test for aldehyde
2,4 DNP test or tollens reagent test
Tollens test
Test to detect aldehyde. A silver mirror is obtained when an aldehyde is heated with tollens reagent
Which organic compound gives a silver mirror when heated with tollens reagent
Aldehyde
Esterification
Confirmatory test for carboxylic acids and alcohol. When a carboxylic acid is heated with an alcohol in the presence of H2SO4 an ester having fruity smell is formd
Which organic compound answers esterification test
Carboxylic acid or alcohol
Simple test to identify carboxylic acid
Sodium bicarbonate test or litmus paper test
What happens when a carboxylic acid is treated with NaHCO3 solution
Brisk effervesce takes place with liberation of CO2 gas
Which organic compound answers carbyl amine test
Primary amine
How to perform carbyl amine test
Primary amine on heating with chloroform and alcoholic KOH or NaOH gives carbyl amine having foul smell
What happens when a primary amine is heated with chloroform and alcoholic KOH solution
Carbyl amine is formed
Azo dye test
To detect aromatic primary amine
When an aromatic primary amine is treated with dilute HCl, sodium nitrite, and beta napthal in NAOH solution at 0 to 5°c give orange dye
Azo dye test colour
Orange red dye
Which organic compound answers azo dye test
Aromatic primary amine
