Unit 2

Question 1

What is a 10 carbon hydrocarbon called

Answer 1

Nonane

Question 2

Why does cracking produce a lot of products

Answer 2

Any carbon - carbon bond can break

Question 3

Why are cyclic hydrocarbons more useful to petrol company’s

Answer 3

Promote efficient combustion

Question 4

What is the equation for fermentation?

Answer 4

C6H12O6 —- 2 C2H5OH + 2 CO2

Question 5

What conditions are needed for fermentation

Answer 5

Absence of oxygen

Use of yeast

Question 6

How is the concentration of the stratosphere maintained?

Answer 6

Rate of decomposition = rate of formation

Question 7

Give an every day use for IR

Answer 7

Breathalysers

Question 8

Give equations for formation and depletion in stratosphere

Answer 8

O3 — O2 + O

O + O2 — O3

Question 9

Why C-I more reactive than C-Br

Answer 9

Bond is weaker, easier to break h

Question 10

What is a replacement for CFCs

Answer 10

HCFCs

Question 11

What does 100% atom economy mean?

Answer 11

All reactants made into desired product

Question 12

Equation for hydration of ethene

Answer 12

C2H4 + H2O — C2H5OH

Question 13

Are the stages to manafacture ethene

Answer 13

Fractional distillation

Cracking

Question 14

What is the average bond enthalpy

Answer 14

When one mole of bonds is broken

Question 15

What is le chateliers principle

Answer 15

Equilibrium shifts to minimise any change

Question 16

Benefit of ozone layer to life

Answer 16

Absorbs UV radiation

UV at earths surface reduced

Question 17

What is the formula for an ally ?

Answer 17

Cn H2n-1 Br

Question 18

What are some sources of nitrogen oxides?

Answer 18

Thunderstorms

Aircraft

Question 19

What is the greenhouse effect dependent on?

Answer 19

Residence time
Ability to absorb IR
Abundance in atmosphere

Question 20

How does a catalytic converter work?

Answer 20

Reactants are absorbed
Bonds in reactants are weakened
Products desorb