Unit 2-(a) Fuels-A. Combustion

Question 0

What is combustion? (2)

Answer 0

• burning

- reacting with oxygen

Question 1

What is a fuel?

Answer 1

A chemical burned to produce energy.

Question 2

What kind of compound are found in oil and natural gas?

Answer 2

mainly hydrocarbons

Question 3

What is a hydrocarbon?

Answer 3

A compound which contains hydrogen and carbon only

Question 4

What do hydrocarbons produce when burned (complete combustion)?

Answer 4

carbon dioxide and water

Question 5

What is the test for carbon dioxide?

Answer 5

Turns lime water from clear to milky/cloudy

Question 6

What are the products of incomplete combustion in hydrocarbons?

Answer 6

Carbon monoxide and carbon

Question 7

In a petrol engine which poisonous gases are formed form nitrogen and oxygen?

Answer 7

nitrogen oxides

Question 8

What poisonous gas do some fuels produce when burned?

Answer 8

sulphur dioxide

Question 9

What kind of harmful particles are produced by incomplete combustion in Diesel engines?

Answer 9

soot particles

Question 10

How can air pollution from combustion of hydrocarbons be reduced?

Answer 10

using catalytic converters