Functional Groups

Question 1

Tollens Reagent

Answer 1

• React Silver nitrate with excess ammonia
• Silver mirror forms
• Ag reduced
• Aldehyde oxidised to Carboxylic acid

Question 2

2,4 DNP

Answer 2

• Forms orange preciptate
• Compare melting points
• Test for carbonyls (Aldehydes and Ketones)

Question 3

Potassium dichromate

Answer 3

• Orange to green (Reduced)
• Oxidised Primary / Secondary alcohols

Question 4

Equation for hydrolysis of nitriles

Answer 4

RC三N + 2H₂O + HCl–> RCOOH + NH₄Cl

Question 5

Equation for forming acyl chloride

Answer 5

RCOOH + SOCl₂ –> RCOCl + SO₂ + HCl