Colour By Design

Question 1

What are the three tests for aldehydes presence?

Answer 1

The Tollen’s test
Add Acidified potassium dichromate
Fehling’s solution

Question 2

What does a successful Tollen’s test look like?

Answer 2

Silver is formed round the edge of the test tube (mirror)

Question 3

What does a successful Fehlings test look like?

Answer 3

Goes from blue to brick red ppt

Question 4

What is contained in Fehlings solution?

Answer 4

Cu2+ alkaline solution
A bidentate ligand
Fehling’s solution

Question 5

What is in Tollens solution?

Answer 5

[Ag(NH3)2]+

Question 6

What is a nucleophile?

Answer 6

Something that donates electrons

Question 7

What is an electrophile

Answer 7

Something that accepts electrons

Question 8

What is the name for the molecule formed when a cyanide undergoes nucleophilic addition?

Answer 8

Cyanohydrins