Hydrogen Peroxide

Question 1

Brown precipitate

Answer 1

Manganate (VII) the colouration is from MnO2

Question 2

Purple solution is decolorised

Answer 2

Manganate (VII) in acid solution

Question 3

Pale green solution turns yellow

Answer 3

Iron (II) to iron (III) in acid solution

Question 4

Green precipitate turns brown

Answer 4

Iron (II) hydroxide to iron (III) hydroxide

Question 5

Brown solution or black precipitate

Answer 5

Iodine from iodide in acid

Question 6

Oxidising and reducing agent

Answer 6

Hydrogen peroxide