4 - The Ozone Story (OZ)

Question 1

Define bond fission

Answer 1

Breaking of a covalent bond

Question 2

Define heterolytic fission

Answer 2

Electrons distributed unequally to form 2 different ions

Question 3

Define homolytic fission

Answer 3

Electrons distributed equally to form 2 uncharged radicals

Question 4

What does double headed arrow represent in bond fission?

Answer 4

Movement of electron pair

Question 5

What does a single headed arrow represent in bond fission?

Answer 5

Shows movement of a single electron

Question 6

1st step of a free radical chain reaction

Answer 6

Initiation:
-2 radicals produced with photochemical reactions
-bond breaks homolytically

Question 7

2nd set of free radical chain reactions

Answer 7

Propagation:
-radical reacts with a non-radical molecule
-new radicals are created which then go on to react with other non-radicals

Question 8

3rd set of free radical chain reactions

Answer 8

Termination:
-2 radicals react and form a non-radical molecule
-ends chain reaction

Question 9

Define photochemical reaction

Answer 9

Using visible light or UV in a reaction