Reactivity

Question 1

Is making ice cubes a chemical or physical change

Answer 1

physical

Question 2

What type of change is reversible

Answer 2

Physical change

Question 3

Metal rusting is what kind of change

Answer 3

Chemical change

Question 4

What type of change results in the formation of a new substance

Answer 4

Chemical change

Question 5

in a chemical change the atoms _______

Answer 5

Are rearranged

Question 6

What indicates there has been a chemical reaction

Answer 6

colour change/bubbling/fizzing

Question 7

If you react magnesium with oxygen what do you end up with

Answer 7

Magnesium oxide

Question 8

What is another name for burning

Answer 8

combustion

Question 9

For iron to rust what reactants do you need

Answer 9

iron, oxygen and water

Question 10

What can we use to protect a metal from corrosion

Answer 10

paint

Question 11

What gas is needed to create an oxide

Answer 11

oxygen

Question 12

When metals react with acids what gas is made

Answer 12

hydrogen

Question 13

What salt is made with nitric acid

Answer 13

nitrate

Question 14

What is the test for hydrogen

Answer 14

lit splint goes pop

Question 15

Which metal is most reactive sodium, magnesium or copper

Answer 15

Sodium

Question 16

Magnesium + Hydrochloric acid —–>Hydrogen+

Answer 16

Magnesium chloride

Question 17

What is the name of a salt made from sulfuric acid?

Answer 17

sulfate

Question 18

What is the name of a salt made from Hydrochloric acid

Answer 18

chloride

Question 19

What gas is produced when metals react with water

Answer 19

Hydrogen

Question 20

Is neutralisation a physical or chemical change

Answer 20

chemical

Question 21

Why are electrolysis used to extract some metals

Answer 21

They are more reactive then carbon

Question 22

Some metals can be extracted using carbon why?

Answer 22

The metal is less reactive then carbon and is displaced

Question 23

What is formed when copper oxide reacts with carbon

Answer 23

copper + carbon dioxide