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Worksheets

Year 7

Total questions: 80

Worksheet time: 44mins

Name
Class
Date
1.

H20 - name?

a)

hydrooxic acid

b)

hydrogen oxygen

c)

water

d)

hydrogen oxide

2.
K20 - name?
a)
potassium dioxide
b)
potassium oxide
c)
potassium oxygen
d)
dipotassium dioxide
3.

CaF2- name?

a)

calcium fluorate

b)

calcium fluoride

c)

fluoride calcite

d)

fluorine calciumate

4.

Na2SO4- name?

a)

sulfur sulfate

b)

sodium sulfide

c)

sodium sulfate

d)

sodium oxygenate

5.

MgO- name?

a)

oxygen magnesium

b)

magnesium oxide

c)

magnesium oxate

d)

magnesium oxygenate

6.
Why does ice float?
a)
Liquid water is less dense than solid water.
b)
Solid water is less dense than liquid water.
c)
Gaseous water is less dense than solid water.
d)
Liquid water is less dense than gaseous water.
7.
What is the formula for density?
a)
density = mass x volume
b)
density = mass / volume
c)
density = mass + volume
d)
density = mass - volume
8.
Frank has a paper clip. It has a mass of 9g and a volume of 3cm3. What is its density?
a)
3 g/cm3
b)
1/3 g/cm3
c)
27 g/cm3
d)
39 g/cm3
9.
A piece of copper has a mass of 89g and a volume of 10 cm3.  What would be the density of the copper?
a)
0.89 g/cm3
b)
89 g/cm3
c)
8.9 g/cm3
d)
890 g/cm3
10.

The picture below is an example of _________________.

a)

osmosis

b)

isotonic

c)

diffusion

d)

active transport

11.
What is diffusion?
a)
when molecules move 
b)
when molecules move from a high concentration to a low concentration.
c)
no movement 
d)
molecules move everywhere
12.

Diffusion occurs only in solids

a)

True

b)

False

13.

An increase in temperature does what to diffusion?

a)

Speeds it up

b)

Slows it down

c)

Stops it

d)

No effect

14.

When does diffusion stop?

a)

After a day and a night

b)

When the particles are evenly spread out

c)

When there are no particles left

d)

When all the particles leave the system

15.
What is the chemical symbol for the element hydrogen
a)
H
b)
He
c)
h
d)
he
16.
What is the chemical symbol for the element Carbon
a)
ca
b)
co2
c)
C
d)
Cd
17.
What is the chemical symbol for the element copper?
a)
co
b)
c
c)
Cu
d)
cu
18.
What is the chemical symbol for the element Aluminum
a)
A
b)
AL
c)
Al
d)
al
19.
What is the chemical symbol for the element Nitrogen
a)
Ni
b)
N
c)
No
d)
Nb
20.
What is the chemical symbol for the element oxygen
a)
O
b)
Oxy
c)
ox
d)
Oy
21.
What is the chemical symbol for the element Iron
a)
I
b)
Ir
c)
Fe
d)
fe
22.
Air is a compound.
a)
True
b)
False
23.
Composition of compounds can be separated.
a)
True
b)
False
24.
Compounds are made up of two or more atoms physically combined.
a)
True
b)
False
25.
The properties of the elements that make up a compound are usually very similar to the compound itself.
a)
True
b)
False
26.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
27.
Which of the substances below is a compound?
a)
ink
b)
air
c)
oxygen
d)
salt
28.
Can compounds be found in the periodic table?
a)
Yes
b)
No
29.
How many carbon atom/s are present in the compounds CaCO3?
a)
1
b)
2
c)
3
d)
4
30.
A pure substance...
a)
is an element or a compound
b)
is an element or a mixture
c)
is a compound or a mixture
d)
is a mixture
31.

1 A substance made up of two or more chemically combined elements is —

a)

an element

b)

mixture

c)

compound

d)

solution

32.
A substance made of only one type of atom is called —
a)
an element
b)
a mixture
c)
a compound
d)
a salt
33.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
34.

This picture represents which of the following?

a)

A single element

b)

Mixture of molecules

c)

mixture of atoms

d)

mixture of compounds

35.

Which pH could belong to a strong acid?

a)

14

b)

8

c)

5

d)

1

36.

Which pH could belong to a strong alkali?

a)

14

b)

8

c)

5

d)

1

37.

Which pH could belong to a weak acid?

a)

14

b)

8

c)

5

d)

1

38.

Which pH could belong to a weak alkali?

a)

14

b)

8

c)

5

d)

1

39.

Which pH is neutral?

a)

14

b)

7

c)

4

d)

2

40.

What is an indicator in Chemistry?

a)

Chemical dyes that can change colour according to pH

b)

A small light bulb on a car

c)

A chemical involved in a chemical reaction

d)

A substance used to neutralise an acid

41.

When a substance changes from one state to another, its particles don’t change.

a)

True

b)

False

42.

When a liquid becomes a gas, we call it..............

a)

boiling/evaporation

b)

melting

c)

sublimation

43.

When a liquid becomes a gas the particles ............

a)

do not move

b)

move slower

c)

move faster

44.

A substance in the ...................state becomes a gas by evaporation or by boiling.

a)

solid

b)

liquid

45.

The temperature at which a substance boils is its ....................

a)

melting point.

b)

boiling point.

c)

freezing point.

46.

Different substances boil at different temperatures

a)

True

b)

False

47.

When a gas becomes a liquid the particles ...................

a)

move slower

b)

move faster

c)

do not move

48.

A gas becomes a liquid by ........................................

a)

freezing

b)

boiling

c)

condensation

49.

If the boiling point of a substance is less than the room temperature, the substance will be in the .................state

a)

solid

b)

liquid

c)

gas

50.

The change of state from solid to liquid is called .................

a)

melting

b)

freezing

c)

boiling

51.

The temperature at which a substance melts is its .......................

a)

melting point

b)

sublimation point

c)

boiling point

52.

Every substance has its own melting point.

a)

True

b)

False

53.

The temperature at which a substance freezes is its ..................................

a)

freezing point

b)

sublimation point

c)

boiling point

54.

Every substance has its own freezing point.

a)

True

b)

False

55.

The freezing point of a pure substance is ............................. melting point.

a)

the same as its

b)

different from its

56.

Complete the word equation below:

Acid + alkali --> ............... + water

a)

water

b)

salt

c)

gold

d)

metal

57.

.............................. + sodium hydroxide --> sodium chloride + water

a)

Nitric acid

b)

Sulphuric acid

c)

Hydrochloric acid

d)

Ethanoic acid

58.

The reaction between an acid and an alkali

produces salt and water. This reaction is called

a)

acidication

b)

neutralisation

c)

alkalisation

59.

The reaction between an acid and alkali produces ____________

a)

salt

b)

acidic solution

c)

water

d)

alkaline solution

60.

Name the ionic compound, LiCl

a)

lithium chlorine

b)

lithium chloride

c)

lithium chlorate

d)

lithium monochloride

61.

Name the ionic compound, CaCO3

a)

calcium carbide

b)

calcium carbon trioxide

c)

calcium carbon oxide

d)

calcium carbonate

62.

Name the ionic compound, FeBr3

a)

Iron (II) bromide

b)

Iron (III) bromide

63.

Name the following compound:

CO2

a)

monocarbon dioxide

b)

carbon oxide

c)

carbon dioxide

d)

oxygen carbonide

64.
What is the proper name for CaCl2?
a)
Calcium dichloride
b)
Monocalcium dichloride
c)
Calcium chloride
d)
Calcium chlorine
65.

What is the correct formula of phosphorus trichloride?

a)

P2Cl3

b)

P3Cl3

c)

PCl3

d)

PCl5

66.

What is the correct molecular formula for sodium nitrate?

a)

NaNO2

b)

Na3N

c)

Na3NO

d)

NaNO3

67.

What is the correct molecular formula for barium hydroxide?

a)

Ba(OH)2

b)

Ba2OH

c)

BaOH

d)

Ba2OH

68.

What is the name for AlBr3?

a)

aluminum bromide

b)

aluminum tribromide

c)

aluminum bromine

d)

monoaluminum tribromide

69.
Name this compound.
MgF2
a)
magnesium fluoride
b)
manganese Phosphide
c)
magnesium(III) fluoride
d)
magnesium fluoride(II)
70.
Name this formula: 
Al2O3
a)
Aluminum Oxide
b)
Aluminum Oxygen
c)
Antimony Oxide
d)
Aluminum (VII) Oxide
71.
find the formula zinc sulfate
a)
ZnSO3
b)
ZnSO4
c)
ZnS
d)
Zn(SO4)2
72.

What is a mixture?

a)

elements chemically combined

b)

a combination of different substances

c)

composed of one atom only

d)

it is made of chemical

73.

The air around is a mixture of gases.

a)

True

b)

False

74.

When two or more substances are combined so each can be separated by physical means, the result is a(n) _____.

a)

chemical change

b)

compounds

c)

mixture

d)

element

75.

Nitrogen (N), Oxygen (O), Carbon (C) and Hydrogen are the most common example of ?

a)

Molecules

b)

Elements

c)

Compounds

d)

Substances

76.

It is a form of matter which mean it has a one

type of atom or molecule.

a)

Substance

b)

Element

c)

Compound

d)

Mixtures

77.

Is water a element or compound?

a)

Element

b)

Compound

78.

A compound consists of two or more elements chemically combined.

a)

True

b)

False

79.

H2O is an example of

a)

Compound

b)

Element

80.

CaCl2 is an example of

a)

Compound

b)

Element

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