WJEC Chemistry Unit 4; chemical tests - Statistics

General Stats

Answer Stats

Test/Reaction	Colour	% Correct
Tollen's Reagent	Silver Mirror	75%
Phenol with Bromine	Orange to Colourless	50%
Oxidation with acidified Potassium Dichromate	Orange to Green	50%
Oxidation with acidified Potassium Manganate	Purple to Colourless	42%
Phenol with aqueous Iron(III) Chloride	to Purple	17%
Iodoform	Colourless to Yellow	8%
Fehling's Reagent	Deep Blue to Orange-Red	8%
2,4-DNP	Orange-Red Solid	8%
Coupling Reaction with Benzenediazonium Salts	Yellow/Orange/Red	8%

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