Science - Chemical Reactions

Question 1

Which types of chemicals can react with acids during a
neutralisation reaction?

Answer 1

Alkalis or a base

Question 2

What two types of elements are there in the Periodic Table?

Answer 2

Metals and Non-metals

Question 3

What are the rows of the Periodic Table called?

Answer 3

Periods

Question 4

What is the change in state that occurs when a gas turns into a
liquid?

Answer 4

Condensation

Question 5

What are the columns of the Periodic Table called?

Answer 5

Groups

Question 6

What happens when we go from one atomic number to another in the periodic table?

Answer 6

It increases by one

Question 7

What are some properties of metals?

Answer 7

Shiny, conduct electricity, conduct heat, flexible, high melting point

Question 8

What are some properties of non-metals?

Answer 8

Dull, do not conduct electricity, do not conduct heat, feeble, low melting point

Question 9

What is a chemical element?

Answer 9

The smallest part of matter that retains specific chemical properties

Question 10

Can chemical elements be broken down by chemical reactions?

Answer 10

Unlike chemical compounds, chemical elements cannot be broken down into simpler substances by any chemical reaction

Question 11

Metal + oxygen

Answer 11

Metal oxide

Question 12

Magnesium + oxygen

Answer 12

Magnesium oxide

Question 13

What is the word equation for the burning of wood?

Answer 13

Wood + oxygen –> carbon dioxide + water

Question 14

Charcoal + oxygen

Answer 14

Carbon dioxide

Question 15

Sulfur + oxygen

Answer 15

Sulfur dioxide

Question 16

(Metal) + (acid)

Answer 16

(Salt) + hydrogen

Question 17

Magnesium + hydrochloric acid

Answer 17

Magnesium chloride + hydrogen

Question 18

Magnesium + sulfuric acid

Answer 18

Magnesium sulfate + hydrogen

Question 19

Magnesium + nitric acid

Answer 19

Magnesium nitrate + hydrogen

Question 20

What is an example of a solute, solvent, and solution?

Answer 20

Solute: Salt
Solvent: Water
Solution: Salt Water

Question 21

Potassium + zinc chloride

Answer 21

Potassium chloride + zinc

Question 22

Zinc + potassium chloride

Answer 22

(No reaction - potassium is a more reactive metal than zinc)

Question 23

Zinc + copper oxide

Answer 23

Zinc oxide + copper

Question 24

What is the reactivity table of metals and elements (from reactive to unreactive)?

Answer 24

1. Potassium
2. Sodium
3. Lithium
4. Calcium
5. Magnesium
6. Aluminium
7. Zinc
8. Iron
9. Lead
10. Copper
11. Silver
12. Gold

Question 25

What is a fuel?

Answer 25

An energy source which is a store of chemical energy

Question 26

What is combustion?

Answer 26

A reaction in which a fuel reacts with oxygen to release thermal energy and light energy

Question 27

What happens if there is plenty of oxygen in a combustion reaction?

Answer 27

The products will all be 'carbon dioxide + water' if there is enough oxygen

Question 28

Methane + oxygen

Answer 28

Carbon dioxide + water

Question 29

What is Thermal Decomposition?

Answer 29

Using heat to break something down

Question 30

Metal oxide + carbon dioxide

Answer 30

Metal carbonate

Question 31

What does an exothermic reaction release into the surroundings?

Answer 31

Heat energy

Question 32

What happens to the temperature in an exothermic reaction?

Answer 32

It increases

Question 33

What chemical reactions take place during an exothermic reaction?

Answer 33

Neutralisation & Combustion

Question 34

What happens to an exothermic reaction?

Answer 34

Condensing and freezing

Question 35

What does an endothermic reaction absorb from the surroundings?

Answer 35

Heat

Question 36

What happens to the temperature in an endothermic reaction?

Answer 36

It decreases

Question 37

Which chemical reactions take place in an endothermic reaction?

Answer 37

Thermal decomposition

Question 38

What happens to an endothermic reaction?

Answer 38

Melting and boiling

Question 39

What happens to the energy of particles when a gas is cooled to form a liquid?

Answer 39

It loses its kinetic energy, so it can't move around as much as it used to

Question 40

Calcium is a metal. What type of solution would calcium oxide form?

Answer 40

Lime water

Question 41

What would happen to blue and red litmus paper if they tested a solution of calcium oxide?

Answer 41

They'd both become blue