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8F and 8G Review

Total questions: 54

Worksheet time: 28mins

Name
Class
Date
1.

According to Dalton’s theory, elements:

a)

are always solids.

b)

contain only one kind of atom.

c)

can be split up into simpler substances.

d)

contain at least two different kinds of atom.

2.

Which of these diagrams shows the particles in a compound?

a)
b)
c)
d)
3.

Which of the following always happens during a chemical reaction?

a)

Compounds react and split up into free atoms.

b)

Elements join together to make new elements.

c)

Atoms are broken down into smaller particles.

d)

The atoms in the reactants are rearranged to make the products.

4.

Which of the following is a chemical change?

a)
b)
c)
d)
5.

The main difference between a chemical change and a physical change is that in a chemical change you always get

a)

a change of state.

b)

heat given out.

c)

a change in colour.

d)

a new substance being formed.

6.

Which of the following could have the formula XY2?

a)
b)
c)
d)
7.

Which element is very unreactive?

a)

Helium

b)

Lithium

c)

Hydrogen

d)

Fluorine

8.

Which of the following describes a group 1 element?

a)

a very reactive metal

b)

a very unreactive metal

c)

a very reactive non-metal

d)

a very unreactive non-metal

9.

Where are most non-metals found in the periodic table?

a)

A

b)

B

c)

C

d)

D

10.

Which of the following substances will be a liquid at 350 °C?

a)

A

b)

B

c)

C

d)

D

11.

Which list contains three typical properties of non-metals?

a)

good conductor of heat, brittle, low melting point

b)

good conductor of electricity, strong, high melting point

c)

poor conductor of heat, strong, high melting point

d)

poor conductor of electricity, weak, low melting point

12.

The elements were arranged in the periodic table in order of increasing:

a)

density

b)

reactivity

c)

melting point

d)

masses of atoms

13.

The way something looks, feels, smells, and tastes are physical properties.

a)

True

b)

False

14.

Anything that has mass and takes up space.

(everything is made of this)

a)

mass

b)

matter

c)

volume

d)

reflectivity

15.

The amount of space and object takes up?

a)

mass

b)

volume

c)

reflectivity

d)

conductivity

16.

A chemical property describes how matter __________.

a)

smells

b)

reacts with another type of matter

c)

looks under a microscope

d)

dissolves when made into a solution

17.

A student mixes yellow powder with water. Which observation would prove a CHEMICAL change occurred?

a)

The powder DISSOLVED in the water

b)

The water turned the COLOR yellow

c)

The bag's TEMPERATURE changed

d)

The STATE OF MATTER changed

18.

Which of the following options provides evidence of a CHEMICAL change?

a)

Wood is burned releasing ash and smoke

b)

Rocks separate when soil is sifted

c)

Water turns to ice when you put it in the freezer

d)

Salt dissolves in water

19.

When iron is exposed to air over a long period of time, it forms rust. This is an example of what?

a)

A new substance forming

b)

Color change: no new substance

c)

Shape change: no new substance

d)

Burning: a new substance

20.

What happens to the atomic numbers as you move from left to right on the periodic table?

a)

Increase

b)

Decrease

c)

Stay the same

d)

Nothing

21.

Select the group that is the most reactive metals

a)

Transition Metals

b)

Alkali Earth Metals

c)

Alkali Metals

d)

Halogens

22.
Which of the following is not a property of most metals?
a)
solid
b)
brittle
c)
strong
d)
malleable
23.
Which of the following statements is true?
a)
Copper is used as a roof covering because it conducts heat well.
b)
Copper is used as a roof covering because it changes to a green colour.
c)
Copper is used as a roof covering because it is malleable.
d)
Copper is used as a roof covering because it is a good conductor of electricity.
24.
Which of the following best describes a catalyst?
a)
A catalyst is a reactant in a chemical reaction.
b)
A catalyst is produced in a chemical reaction.
c)
A catalyst speeds up a chemical reaction.
d)
A catalyst causes a different product to be made in a chemical reaction.
25.
The product formed when calcium reacts with fluorine is …
a)
calcium fluoride
b)
fluorine calcide
c)
calcium chlorine
d)
calcium fluorate
26.
A copper coin is shiny when it is new, but will eventually go black and dull. The two words which best describe this process are:
a)
neutralisation and rusting.
b)
rusting and corrosion.
c)
corrosion and oxidation.
d)
oxidation and neutralisation.
27.
When scratched to remove its surface, which of the following metals will react most quickly with the air?
a)
aluminium
b)
copper
c)
lead
d)
tin
28.
What must be present for iron to rust?
a)
water alone
b)
oxygen alone
c)
air alone
d)
water and oxygen
29.
Painting stops iron rusting because the paint:
a)
is a catalyst for rusting.
b)
keeps out air and water.
c)
reacts with the air instead of iron.
d)
dries up any moisture in the environment.
30.
Which of the following metals is so reactive it is stored under oil?
a)
aluminium
b)
copper
c)
magnesium
d)
sodium
31.
Complete the word equation:calcium + water ?
a)
calcium oxide + oxygen
b)
calcium sulfate + hydrogen
c)
calcium + oxygen
d)
calcium hydroxide + hydrogen
32.
The test for hydrogen gas is that it:
a)
relights a glowing splint.
b)
turns limewater milky.
c)
burns with a squeaky pop.
d)
turns pH indicator purple.
33.
What is missing from the symbol equation : 2Na + 2_____ -> 2NaOH + H2
a)
H2
b)
H2O
c)
HCl
d)
H2SO4
34.
Zn + H2SO4 -> ________ + H2 Which of the following formulae represents the missing salt in the above equation?
a)
SO4
b)
H2SO4
c)
ZnSO4
d)
Zn(OH)2
35.
Which of the following best describes an alloy?
a)
a pure metal
b)
a mixture of compounds
c)
a metal with one or more other elements mixed in
d)
compound of a metal with a non-metal
36.
The temperature of a solid piece of metal rises steadily as it is heated. At a particular point the temperature stops rising and stays constant, even though heating continues.While the temperature stays constant, the metal is:
a)
melting
b)
oxidising
c)
corroding
d)
evaporating
37.

Steel is made up of...

a)

iron and carbon

b)

copper and iron

c)

tin and carbon

d)

aluminium and nickel

38.

All alloys are mixtures

a)

True

b)

False

39.

All metal elements melt at the same boiling point.

a)

True

b)

False

40.

Which of these pictures shows the particles in a solid, pure metal?

a)
b)
c)
d)
41.
What is corrosion?
a)
The release of oxygen
b)
Breakdown of a metal
42.

Which diagram shows the most favourable conditions for rust to appear on the nail?

a)

A

b)

B

c)

C

d)

D

43.

What is the scientific name for rust?

a)

Iron hydroxide

b)

Iron oxide

c)

Rust oxide

d)

Rust hydroxide

44.

The reaction with oxygen at the surface of a metal is called...

a)

Rusting

b)

Galvanising

c)

Corrosion

d)

Reduction

45.

The process of covering metal with a protective layer of a different metal to prevent corrosion is called...

a)

Rusting

b)

Galvanising

c)

Corrosion

d)

Electrolysis

46.

What is this the definition of? "A substance that changes the speed of a reaction without being permanently changed itself."

a)

Metal

b)

Metal oxide

c)

Chemical

d)

Catalyst

47.

In the formula TiO2, how many oxygen atoms are present?

a)

1

b)

2

c)

3

d)

4

48.
A way of writing out what happens in a chemical reaction using a symbol to represent the substances involved
a)
symbol equation
b)
physical property
c)
reactivity series
d)
stainless steel
49.
A description of how quickly or vigorously something reacts
a)
reactivity
b)
effervescence
c)
physical property
d)
rusting
50.

What is corrosion?

a)

When hydrogen is introduced into the metal, it becomes brittle.

b)

When metal heated upon melting point, it melts.

c)

When metal reacts with oxygen, it forms an oxide layer on its surface.

d)

I have no idea

51.

Metal + acid --> ?

a)

Salt + Hydrogen

b)

Salt + Oxygen

c)

Sugar + Oxygen

d)

Oxygen + Hydrogen

52.

What is the salt "?"

Ｍg + H2SO4 --> "?" + H2

a)

MgS

b)

MgSO2

c)

MgSO4

d)

MgH2

53.

What is the salt "?"

Fe + HCl --> "?" + H2

a)

FeCl

b)

FeCl2

c)

FeH2

d)

FeClO

54.

In most time, why can't we see salt when metal + acid ?

a)

Since salts are too small.

b)

Since salts are mostly colorless and soluble to the liquid.

c)

Since salts are kinds of gas.

d)

Since salts are too shy.

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