Fuels (2)

Question 1

Which of these mixtures shows formulae of substances that could be in the gaseous fraction of crude oil

Answer 1

C

Question 2

State which oil well contained the greatest combined total of diesel oil and fuel oil

Answer 2

C

Question 3

State which oil well produced a crude oil containing the highest percentage of high boiling point fractions

Answer 3

A

Question 4

Explain how ethene is produced using the apparatus

Answer 4

• decane is heated and vaporises / turns into a gas
• decane gas breaks down as it comes in contact with hot porous pot
• large molecules of decane produce smaller molecules including ethene

Question 5

what is the formula of product Z

Answer 5

B - c4h10

Question 6

fraction is more difficult to ignite

order

Answer 6

• fuel oil
• gases
• diesel oil

fgd

Question 7

which of these cannot be a product of burning hydrocarbon fuels

Answer 7

C - Hydrogen

Question 8

Explain how carbon monoxide can cause death

Answer 8

• combines with haemoglobin so oxygen cannot combine

- causes lack of oxygen to brain

Question 9

Explain a problem caused by growing plants to produce biofuels

Answer 9

• uses up farm space

- less land to grow crops for food

Question 10

Which of the following is true

statements on fractioning column

Answer 10

C - molecules in diesel oil are larger than molecules in petrol

Question 11

Explain what is meant by cracking

Answer 11

• breakdown of hydrocarbons

- into smaller hydrocarbons

Question 12

explain why is ethene is describe as an unsaturated hydrocarbon

Answer 12

• contains double bond

- contains ONLY carbon and hydrogen

Question 13

Describe what you would see when a sample of ethene is shaken with bromine water

Answer 13

• from orange

- to colourless

Question 14

complete combustion produces??

Answer 14

water and carbon dioxide

Question 15

State two factors that make a good fuel

Answer 15

• easy to ignite

- easy to store/contain

Question 16

Natural Gas is a good fuel because ..?

Answer 16

D - produces no solid waste in complete combustion

Question 17

explain how these gases could cause an increase in the temperature of the earth

Answer 17

• carbon dioxide released into atmosphere

- absorbs heat radiated from earth

Question 18

Explain how incomplete combustion occurs and the problems it can cause

Answer 18

How does it occur?

• lack of oxygen
• poor ventilation may lead to lack of oxygen and
• complete combustion cannot take place

Produces :

• carbon monoxide , toxic poisonous
• spot, carbon particulates

effects:

• wastes fuel
• soot stain building and statues
• can cause health problems
• carbon monoxide is toxic
• combined with haemoglobin
• prevents blood from carrying oxygen
• no oxygen reaches cells = death