Yr 11 - Redox Reactions

Question 1

What is oxidation?

Answer 1

Loss of electrons (charge increases)

Question 2

What is reduction?

Answer 2

Gain of electrons (charge decreases)

Question 3

Colour of copper (Cu)

Answer 3

Red metal

Question 4

Color of Bromine (Br₂)

Answer 4

Orange soln

Question 5

Colour of Chlorine (Cl₂)

Answer 5

Pale green gas

Question 6

Colour of Chromium ion (Cr³⁺)

Answer 6

Green soln

Question 7

Colour of Copper ion (Cu²⁺)

Answer 7

Blue soln

Question 8

Colour of Dichromate ion (Cr₂O₇²⁻)

Answer 8

Orange soln

Question 9

Colour of Hydrogen and Oxygen (H₂ and O₂)

Answer 9

Colourless gas

Question 10

Colour of Iodine (I₂)

Answer 10

Yellow/brown soln

Question 11

Colour of Iron II (Fe²⁺)

Answer 11

Pale green soln

Question 12

Colour of Iron III (Fe³⁺)

Answer 12

Pale orange/brown soln

Question 13

Colour of Nitrogen dioxide NO₂

Answer 13

Brown gas

Question 14

Colour of Permangante ion (MnO₄₋)

Answer 14

Purple soln

Question 15

Colour of sulphur dioxide (SO₂)

Answer 15

Colourless gas

Question 16

Colour of water (H₂O)

Answer 16

Colourless liquid

Question 17

Colour of zinc (Zn)

Answer 17

Silver metal

Question 18

Colour of every other option in Redox?

Answer 18

Colourless soln