Term 1- Chemical Reactions Interim Test Year 8

Front 1

What do metals react with oxygen to become?

Back 1

Metal Oxides

Front 2

Are high or less reactive metals discovered first? And why?

Back 2

Less reactive metals and because they are always found in their elementary form.

Front 3

Why are high reactive metals discovered later?

Back 3

Because they exist in their combined form with other elements which causes it to be harder to identify

Front 4

What do metals become when they react with water?

Back 4

Metals react to become metal hydroxides.

Front 5

What do metals react with acids to become?

Back 5

They react with metals to become hydrogen and a salt

Front 6

What is a displacement reaction?

Back 6

When a more reactive metal replaces a less reactive metal from a compound.

Front 7

How do you test for hydrogen

Back 7

To test for hyrdogen you put a lighted splint in a test tube and if there is a squeaky pop that means hydrogen gas was produced.

Front 8

Why does it pop during the test for hydrogen gas?

Back 8

Because the flame ignites the hydrogen.

Front 9

Hydrochloric Acid =

Back 9

HCL

Front 10

Water =

Back 10

H2O

Front 11

What happens to the metal that had been replaced in a displacement reaction?

Back 11

It becomes an element

Front 12

Every substance can be put into three groups. What are groups?

Back 12

Elements, Compounds and Mixtures.

Front 13

Name the simplest substance and where are they found?

Back 13

Elements - are found in the Periodic Table

Front 14

What are substances made up of?

Back 14

Tiny Particles

Front 15

Name the different particles of substances can be put into one of three types.

Back 15

Atoms, molecules and ions.

Front 16

Name the most reactive metal

Back 16

Potassium

Front 17

Name the least reactive metal

Back 17

Gold

Front 18

Name the metals with the most reactive in the reactivity series.

Back 18

Pottassium, Sodium, Calcium, Magnesium, Aluminium

Front 19

Name the metals with medium reactivity

Back 19

Zinc, Iron, Lead, Copper

Front 20

Name the non reactive metals in the reactivity series

Back 20

Sliver And Gold

Front 21

What is the name for a metal that produces an alkaline solution?

Back 21

Alkali Metals

Front 22

Is a salt produced when metals react with acids?

Back 22

Yes

Front 23

What is another name for a displacement reaction?

Back 23

Competition Reaction

Front 24

Why can they be produced when metals react with water?

Back 24

Because they are present in compound water.

Front 25

What two gases can be produced when metals react with water?

Back 25

Hydrogen And Oxygen

Front 26

Where are medium reactivity metals found?

Back 26

They are found in ores

Front 27

What do you heat🔥🔥medium reactivity metals with?

Back 27

Carbon

Front 28

Do less reactive metals usually react with hot or cold acids?

Back 28

Hot acids

Front 29

Where are unreactive metals usually found?

Back 29

They are found naturally in the enviroment

Front 30

Between medium reactive and unreactive metals which is common and which is expensive and rare

Back 30

Common - Medium Reactive Metals
Expensive And Rare - Non Reactive

Front 31

How are reactive metals extracted?

Back 31

They are extracted by eletrolysis

Front 32

When were reactive metals discovered?

Back 32

They have been discovered since 1800.

Front 33

What are elements?

Back 33

They contain one type of atom

Front 34

What is a compound?

Back 34

It has two or more chemically bonded atoms.

Front 35

What are mixtures?

Back 35

Made my mixing other substances together

Front 36

What is the texture of a precipate?

Back 36

A powdery insiulble solid

Front 37

What is the texture of a precipate?

Back 37

A powdery insoluble solid

Front 38

What is a precipitate recaction?

Back 38

When two soluble solutions form an insoluble solid.

Front 39

How do you test for carbon dioxide?

Back 39

When lime water turns cloudy

Front 40

How do you test for carbon dioxide?

Back 40

When lime water turns cloudy

Front 41

What is decomposition?

Back 41

When one compound breaks into two compounds.

Front 42

How do you test for carbon dioxide?

Back 42

When lime water turns cloudy

Front 43

What is decomposition?

Back 43

When one compound breaks into two compounds.

Front 44

One or more _____________ are formed in all chemical reactions.

Back 44

Products

Front 45

Name other words that can be used to describe reactions with oxygen:

Back 45

Burning
Combustion
Oxidation

Front 46

How do you test for carbon dioxide?

Back 46

When lime water turns cloudy

Front 47

What is decomposition?

Back 47

When one compound breaks into two compounds.

Front 48

One or more _____________ are formed in all chemical reactions.

Back 48

Products

Front 49

Name other words that can be used to describe reactions with oxygen:

Back 49

Burning
Combustion
Oxidation

Front 50

What is a thermal decomposition reaction?

Back 50

When compounds decompose when you heat them.

Front 51

Acids + Carbonate =

Back 51

Produces carbon dioxide

Front 52

Name ways to tell when a chemical reaction has taken place -

Back 52

Change in smell, colour, temperature and gas evolution

Front 53

Name ways to tell when a chemical reaction has taken place -

Back 53

Change in smell, colour, temperature and gas evolution

Front 54

What are reactants?

Back 54

The substances you start with

Front 55

Name ways to tell when a chemical reaction has taken place -

Back 55

Change in smell, colour, temperature and gas evolution

Front 56

What are reactants?

Back 56

The substances you start with

Front 57

What are products?

Back 57

Any new substance that is made during a chemical reaction.

Front 58

What are physical changes?

Back 58

No new substance is made but there is change in appearance eg state changes

Front 59

What is a chemical change?

Back 59

Chemical reactions usually involve change in apprarance. It involves the formation of one or more new substances