Natures Chemistry

Question 1

What is a Homologous Series?

Answer 1

It is a family of compounds with the same general formula and similar chemical properties

Question 2

What are Hydrocarbons?

Answer 2

They are compounds containing only hydrogen and carbon

Question 3

Are alkanes saturated or unsaturated?

Answer 3

They are saturated

Question 4

What are alkanes commonly used as?

Answer 4

Fuels

Question 5

Are alkanes soluble or insoluble in water?

Answer 5

Insoluble

Question 6

What is the general formula for alkanes

Answer 6

CnH2n+2

Question 7

Are cycloalkanes saturated or unsaturated?

Answer 7

Saturated

Question 8

Are cycloalkanes soluble or insoluble in water?

Answer 8

Insoluble

Question 9

What is the general formula for cycloalkanes?

Answer 9

CnH2n

Question 10

Are Alkenes saturated or unsaturated?

Answer 10

Unsaturated

Question 11

Are Alkenes soluble or insoluble in water?

Answer 11

Insoluble

Question 12

Which contain double bonds? Alkanes or alkenes ?

Answer 12

Alkenes

Question 13

What is the general formula for alkenes?

Answer 13

CnH2n

Question 14

What is an isomer?

Answer 14

A compound with the same molecular formula but a different structural formula

Question 15

What compounds are described as saturated?

Answer 15

Compounds containing only single carbon bonds

Question 16

What solution can test if a compound is saturated or unsaturated?

Answer 16

Bromine solution. Unsaturated compounds will decolour the solution

Question 17

Are alcohols saturated or unsaturated?

Answer 17

Saturated

Question 18

What molecules do alcohols contain?

Answer 18

Carbon hydrogen and oxygen

Question 19

What are alcohols commonly used as?

Answer 19

Fuels and solvents

Question 20

Combustion definition?

Answer 20

When a substance burns in oxygen

Question 21

What are the products in a combustion reaction?

Answer 21

Carbon dioxide and water

Question 22

What are exothermic reactions?

Answer 22

Reactions which give out heat to the surroundings

Question 23

What are endothermic reactions?

Answer 23

Reactions which take in heat from the surroundings

Question 24

What is the general formula for alcohols?

Answer 24

CnH2n+1OH

Question 25

What is the pH of alcohols ?

Answer 25

7

Question 26

What alcohols and carboxylic acids are miscible with water?

Answer 26

Methanol, ethanol and propanol (solubility decreases as size increases) Methanoic, ethanoic, propanoic and butanoic acids

Question 27

What functional group are alcohols a part of ?

Answer 27

Hydroxyl

Question 28

What molecules do carboxylic acids contain?

Answer 28

Carbon hydrogen and oxygen

Question 29

What functional group are carboxylic acids a part of

Answer 29

The carboxyl group

Question 30

What are carboxylic acids used for?

Answer 30

Preparation of preservatives, soaps and medicines | Ethanoic acid vinegar for chips

Question 31

What is the general formula for carboxylic acids?

Answer 31

CnH2n+1 COOH

Question 32

What is the pH of carboxylic acids?

Answer 32

pH of less than 7

Question 33

What do carboxylic acids react with to form salts?

Answer 33

Bases Bases neutralise acids

Question 34

What are the categories of bases?

Answer 34

Metal oxides Metal hydroxides Metal carbonates

Question 35

What is the salt called for methanoic acid

Answer 35

Methanoate | Add oate to the end for salts instead of oic

Question 36

What is the product when carboxylic acids react with metal oxides and metal hydroxides?

Answer 36

Salt and water

Question 37

What is produced when carboxylic acids react with metal carbonates?

Answer 37

Salt water and carbon dioxide