Chemisty Module 3 Test

Question 1

What is distillation?

Answer 1

Distillation is the process of separation or purification dependent on difference in boiling point

Question 2

Whats Fractional Distillation?

Answer 2

Fractional distillation is the process used to separate crude oil into different fractions

Question 3

Whats a fraction

Answer 3

A group of compounds with boiling points within a given range

Question 4

What comes out the fractional distillation at 40 degrees

Answer 4

Gasoline

Question 5

What comes out of fractional distillation tower at 110 degrees

Answer 5

Naphtha for chemicals

Question 6

What comes out of the fractional distillation tower at 180 degrees

Answer 6

Kerosine for fuel

Question 7

What comes out of the fractional distillation tower at 260 degrees

Answer 7

Diesel oil for fuel

Question 8

What comes out of the fractional distillation tower at 340 degrees

Answer 8

Residue for fuel,lubrication and road tar

Question 9

Boiling point

Answer 9

The temperature at which a liquid turns into a gas

Question 10

Flammability

Answer 10

Ease of combustion

Question 11

Viscosity

Answer 11

A description of how “thick” a liquid is

Question 12

Volatility

Answer 12

Ease of evaporation

Question 13

What are the properties of a fraction

Answer 13

The fractions have different properties because they contain hydrocarbons of different sizes

Question 14

What does the size of a hydrocarbon depend on

Answer 14

The number of carbon atoms it has

Eg 1 carbon atom would be small but 50 would be a larger size

Question 15

As the number of carbon atoms increases what happens

Answer 15

🩷The boiling point increases
🩷the flammability decreases
🩷the viscosity increases

Question 16

Fractions containing small hydrocarbons are

Answer 16

🩷volatile
🩷light in colour
🩷runny
🩷highly flammable

Question 17

2 major issues associated with burning fossil fuels

Answer 17

Global warming and acid rain

Question 18

What does an increase in the amount of carbon dioxide in the atmosphere cause

Answer 18

🩷Traps re-radiated heat
🩷less heat is emitted to space
🩷global temperatures rise and climate change occurs

Question 19

What is created in a limited supply of oxygen when fossil fuels are burned

Answer 19

Carbon, Carbon monoxide and water
(Incomplete combustion)

Question 20

Whats the equation for the “incomplete combustion of hydrocarbons”

Answer 20

Hydrocarbon+oxygen—> carbon+carbon monoxide+water

Question 21

What is sulfur

Answer 21

An impurity found in coal

Question 22

What is the effect of sulfur

Answer 22

When coal is burned the sulfur(impurities) combine with oxygen to produce sulfur dioxide

Question 23

Word equation for sulfur dioxide

Answer 23

sulfur(s)+oxygen(g)—>sulfur dioxide(g)

Question 24

What is the problem with sulfur dioxide

Answer 24

The gas is very soluble and dissolves in rain water to
produce an acidic solution

Question 25

How is nitrogen dioxide produced?

Answer 25

The sparking of air in car engines

Question 26

Whats the word equation for the produce of nitrogen dioxide

Answer 26

Nitrogen(g)+oxygen(g)—>nitrogen dioxide (g)

Question 27

Whats the problem with nitrogen dioxide?

Answer 27

Nitrogen dioxide dissolves in rain water to form an acidic solution

Question 28

Whats the impact with acid rain?

Answer 28

Damages buildings made from limestone and marble and accelerates the corrosion of metal structures

Question 29

What harm does acid rain have to living things

Answer 29

Kills plant life and harmful to aquatic organisms

Question 30

What is photosynthesis?

Answer 30

Photosynthesis is the process by which plants make carbohydrates from carbon dioxide and water.

Question 31

When is carbohydrate glucose produced?

Answer 31

carbohydrate glucose is produced and oxygen is released during photosynthesis.

Question 32

What is the word equation for the production pf glucose+oxygen

Answer 32

carbon dioxide + water → glucose + oxygen

Question 33

What do plants require to absorb light energy?

Answer 33

Chlorophyll

Question 34

Whats the main function of carbohydrates in our diet?

Answer 34

Provide us with energy

Question 35

What elements does Carbohydrate contain?

Answer 35

Carbon hydrogen and oxygen

Question 36

What happens when a carbohydrate undergo combustion

Answer 36

They release energy and produce carbon dioxide and water

Question 37

What is the word equation for the products of carbon dioxide + water

Answer 37

Carbohydrate+oxygen—>carbon dioxide +water

Question 38

What is an exothermic reaction?

Answer 38

A reaction when energy is given out

Question 39

What is respiration?

Answer 39

Respiration is the process which releases energy in plants and animals

Question 40

Why is respiration important for all living things?

Answer 40

Respiration is important for all living things because it provides energy when glucose is broken down in the body.

Question 41

What is used to make alcohol?

Answer 41

Fermentation has been used since ancient times for making alcholic beverages

Question 42

What are the necessary ingredients for fermentation?

Answer 42

Carbohydrate,water and yeast