Redox Reactions

Question 1

combustion

Answer 1

a chemical reaction in which a substance reacts with oxygen

Question 2

respiration

Answer 2

chemical reaction by which biological cells release energy stored in glucose

Question 3

redox reaction

Answer 3

a reaction involving both reduction and oxidation

Question 4

corrosion

Answer 4

process when metals/alloys are chemically attacked, water or any other elements (in immediate environment)

Question 5

reducing agent

Answer 5

a substance that reduces another substance during a redox reaction (is itself oxidised)

Question 6

oxidising agent

Answer 6

a substance that oxidises another substance during a redox reaction (itself is reduced)

Question 7

displacement reaction

Answer 7

a reaction in which a more reactive element displaces a less reactive metal (from a solution of salt)

Question 8

oxidation number

Answer 8

number given to show whether an element has been oxidised or reduced

Question 9

oxidation

Answer 9

1. reaction in which oxygen is added to element/compound
2. loss of electrons from an atomn
3. a reaction where the oxidation state of an elemnt has increased

Question 10

reduction

Answer 10

1. reaction in which oxygen is removed to element/compound
2. gain of electrons in an atomn
3. a reaction where the oxidation state of an elemnt has decreased