10. Reduction and Oxidation

Question 1

Does Reduction or Oxidation lose oxygen?

Answer 1

reduction

Question 2

Does Oxidation lose or gain oxygen?

Answer 2

gain oxygen

Question 3

Pick the correct word in the bracket
Reduction: (gain/lose) hydrogen
Oxidation: (gain/lose) hydrogen

Answer 3

Reduction gain hydrogen
Oxidation lose hydrogen

Question 4

Which process loses electrons? (oxidation/reduction)

Answer 4

oxidation

Question 5

In the process of reduction electrons are gain. (True/False)

Answer 5

true

Question 6

Define oxidation state

Answer 6

1. the charge an atom of an element would have
2. can take on a (+)/(-)/0 charge
3. lose electron= increase oxidation state
4. gain electron= decrease in oxidation state

Question 7

How to test for oxidising agents?

Answer 7

• using potassium iodide
• It will turn from colourless to reddish brown

Question 8

How to test for reducing agent?

Answer 8

• using potassium manganate
• will turn from purple to colorless

Question 9

Define an oxidising agent

Answer 9

• Oxidise the other substance
• decrease the oxidation state
• gain electrons

Question 10

Define a reducing agent

Answer 10

• Reduces the other substance
• Decrease in oxidation state
• gain electrons