Chemistry Gr.10 T1

Question 1

What is a variable?

Answer 1

Any factor or condition that can exist in different amounts or types.

Question 2

What are 6 properties that materials can have?

Answer 2

1. Strength
2. Thermal and electrical conductivity
3. Brittleness, malleability, ductility
4. Magnetic/ non-magnetic
5. Density
6. Melting and boiling point

Question 3

What 2 types of matter do you get?

Answer 3

Mixtures

Pure substance

Question 4

What 2 types of mixtures are there?

Answer 4

Homogeneous mixtures

Heterogeneous mixtures

Question 5

What 2 types of pure substances are there?

Answer 5

Elements

Compounds

Question 6

What would water be an example of?

Answer 6

A compound

Question 7

What would wine be an example of?

Answer 7

A homogeneous mixture

Question 8

What would iron be an example of?

Answer 8

An element

Question 9

What would cream soda be an example of?

Answer 9

A heterogeneous mixture. (Because of the bubbles)

Question 10

What 2 types of heterogeneous mixtures are there?

Answer 10

Suspensions and emulsions

Question 11

What is the difference between emulsions and suspensions?

Answer 11

Suspension: solid in a liquid

Emulsion: liquid in a liquid

Question 12

How does one separate salt from water?

Answer 12

Evaporation

Question 13

How do you separate iron from sulphur?

Answer 13

Magnetism

Question 14

How does one separate coloured ink?

Answer 14

Chromatography

Question 15

What is a compound?

Answer 15

Different atoms bonded in fixed ratios.

Question 16

What is an element?

Answer 16

Only one type of atom.

Question 17

What is a physical change?

Answer 17

When parts of the mixture that are separated still keep their properties.

Question 18

Name the formula and common name of calcium carbonate.

Answer 18

CaCO
3

Marble, limestone, chalk

Question 19

Name the formula and common name of sodium nitrate

Answer 19

NaNO
3

Chile saltpetre

Question 20

Name the formula of zinc sulphate.

Answer 20

ZnSO
4

No common name

Question 21

Name the formula and common name of sodium chloride

Answer 21

NaCl

Table salt

Question 22

Name the formula of copper (||) chloride.

Answer 22

CuCl
2

No common name

Question 23

What is the formula for chalk?

Answer 23

CaCO

3

Question 24

What is the formula for chile saltpetre

Answer 24

NaNO

3

Question 25

What is the formula for table salt?

Answer 25

NaCl

Question 26

Name the formula of calcium chloride.

Answer 26

CaCl 2 No common name

Question 27

Name the formula of sodium bromide

Answer 27

NaBr No common name

Question 28

Name the formula of sodium oxide.

Answer 28

Na O 2 No common name

Question 29

Name the formula and common name of hydrogen chloride.

Answer 29

HCl Hydrochloric acid

Question 30

Name the formula and common name of hydrogen nitrate

Answer 30

HNO 3 Nitric acid

Question 31

Name the formula and common name of dihydrogen sulphate

Answer 31

H SO 2 4 Sulfuric acid

Question 32

Name the formula and common name of calcium oxide

Answer 32

CaO Quicklime

Question 33

Name the formula of copper (||) oxide

Answer 33

CuO No common name

Question 34

Name the formula of sodium oxide.

Answer 34

Na O 2 No common name

Question 35

Name the formula and common name of calcium hydroxide

Answer 35

Ca(OH) 2 Slaked lime

Question 36

Name the formula and common name of sodium hydroxide

Answer 36

NaOH Caustic soda

Question 37

What is the formula for caustic soda?

Answer 37

NaOH

Question 38

What is the formula for slaked lime?

Answer 38

Ca(OH) | 2

Question 39

What is the formula for quicklime?

Answer 39

CaO

Question 40

What is the formula for sulfuric acid?

Answer 40

H SO | 2. 4

Question 41

What is the formula for nitric acid?

Answer 41

HNO | 3

Question 42

What is the formula for hydrochloric acid?

Answer 42

HCl

Question 43

What is the difference between a symbol and a formula?

Answer 43

Elements have symbols. Compounds have formulas with the amount of each element in the compound.

Question 44

What are the 3 types of ions?

Answer 44

Metal ions Non-metal ions Polyatomic ions

Question 45

What are the 3 types of molecules in terms of conductivity?

Answer 45

Metals Non-metals Metalloids

Question 46

What are the 3 ferromagnetic elements?

Answer 46

Iron Cobalt Nickel

Question 47

What is Brownian motion?

Answer 47

The jerky, random motion of particles because of collisions.

Question 48

What is diffusion?

Answer 48

The movement of a fluid from a high concentration to a low concentration.

Question 49

What 2 things does the state of a substance depend on?

Answer 49

Kinetic energy of its particles Intermolecular forces between its particles

Question 50

What does kinetic energy in a particle do?

Answer 50

It determines how much particles move.

Question 51

What does intermolecular force do?

Answer 51

It holds particles together.

Question 52

What is temperature?

Answer 52

A measure of a particle's average kinetic energy.

Question 53

What are the 4 steps of the kinetic molecular theory?

Answer 53

1. Particles gain kinetic energy. 2. Particles move faster 3. Particles have enough energy to break intermolecular forces 4. Particles move further apart (phase change)

Question 54

What do you call it when a solid becomes a gas?

Answer 54

Sublimation

Question 55

What is a melting point?

Answer 55

The temperature at which a solid becomes a liquid.

Question 56

What is the Kinetic Molecular Theory?

Answer 56

A theory that explains observed changes of state in terms of position and speed of the particles.