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Grade 10 Chemistry

Total questions: 50

Worksheet time: 1hrs 1mins

Name
Class
Date
1.
Identify this type of reaction: 
Al (s) + HCl (aq) → AlCl3 (aq) + H2 (g)
a)
Precipitation
b)
Synthesis
c)
Combustion
d)
Single Replacement
2.

The Law of Conservation of Mass states that the total mass of the reactants should be

a)

More than the mass of the products

b)

Equal to the mass of the products

c)

Ignored during the reaction

d)

Less than the mass of the products

3.

Which of the following reactions involves the ions of two compounds exchanging places to form two new compounds?

a)

Synthesis

b)

Double Displacement

c)

Combustion

d)

Single Displacement

4.

When balancing equations, the rule is that you can only add, change, and remove ____________

a)

Coefficients

b)

Mass

c)

Subscripts

d)

Elements

5.
The formation of water is an example of a ________ reaction because two simple substances (H and O) combine to produce a new compound (H2O).
a)
Single Displacement
b)
Decomposition
c)
Double Replacement
d)
Synthesis
6.
The following reaction is an example of what reaction type? 
CoCO3 → CoO + CO2
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
7.

Combustion reactions will always involve

a)

Oxygen and a solid

b)

Liquid nitrogen and heat

c)

Oxygen and heat/energy

d)

CO and H2O

8.
Which of the following is an example of synthesis?
a)
Na + Br2 --> NaBr
b)
KClO3 --> KCl + O2
c)
HgO + Cl2-->HgCl + O2
d)
Cl2 + NaBr --> NaCl + Br2
9.
Which of the following is an example of decomposition?
a)
Na + Br2 --> NaBr
b)
KClO3 --> KCl + O2
c)
HgO + Cl2-->HgCl + O2
d)
Cl2 + NaBr --> NaCl + Br2
10.

What is the correct name for Al(NO3)3?

a)

Aluminum nitrate

b)

Aluminum(III) nitrate

c)

Aluminum nitrite

d)

Aluminum nitrogen trioxide

11.

Name this formula:

KNO3

a)

Potassium Nitrogen Oxide

b)

Potassium Nitride

c)

Potassium Nitrate

d)

Potassium (I) Nitrite

12.

Name the compound NH4OH

a)

ammonium hydroxide

b)

ammonia oxyhydride

c)

mononitrogen tetraoxihydride

d)

hydrogen nitrate

13.

What are the products when hydrobromic acid is mixed with sodium hydroxide

a)

H2O and NaBr

b)

HBr and NaOH

c)

OBr and NaH

d)

Na and BrOH

14.
The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?
a)
3
b)
9
c)
7
d)
5
15.
When dissolved in water, acids produce:
a)
bases
b)
salts
c)
hydrogen ions
d)
hydroxide ions
16.
In a neutralization reaction, what are the products of a reaction between an acid and a base?
a)
Another acid and base
b)
Carbon dioxide and a salt
c)
Water and a salt
d)
Either two acids or two bases
17.
The atomic number tells you what?
a)
number of electrons
b)
number of protons
c)
number of neutrons
d)
both electrons and protons in an atom.
18.
Each column in the periodic table is called a 
a)
period
b)
group
c)
cluster
d)
unit
19.
The atoms along the staircase are called 
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
20.
Which is a halogen?
a)
Helium
b)
Chlorine
c)
Oxygen
d)
Neptune
21.

How many Valance electrons does Iodine have?

a)
6
b)
16
c)
7
d)
17
22.

How many electrons does oxygen need to fill its outer shell?

a)
3
b)
4
c)
1
d)
2
23.
What happens in ALL chemical changes?
a)
Change in state of matter
b)
A new substance is formed
c)
Bubbles are produced
d)
An explosion
24.
Ionic Bonding involves...
a)
The transfer of protons
b)
The transfer of nuetrons 
c)
The transfer of electrons
d)
None Of the above
25.

In this chemical equation, the elements in red are the_______.

a)

Products

b)

Reactants

c)

Subscripts

d)

Coefficients

26.

Nonmetals tend to

a)

gain electrons

b)

lose electrons

27.

Metals tend to

a)

gain electrons

b)

lose electrons

28.

Ions are formed when atoms...

a)

lose or gain electrons

b)

lose electrons

c)

gain electrons

d)

gain neutrons

29.

Many ionic compounds are soluble in water.

a)

True

b)

False

30.

The name for the ionic compound NaF is

a)

Sodium fluoride

b)

Nappium fluoride

c)

Sodium fluorine

d)

Fluorine sodiumide

31.

Which of these is NOT a polyatomic ion?

a)

OH-

b)

CO32-

c)

PO43-

d)

Cl-

e)

ClO4-

32.

The name of FeCl₂ is

a)

iron chloride

b)

iron (II) chloride

c)

iron (I) chloride

d)

iron dichloride

33.

LiBr is called

a)

lithium bromine

b)

lithium (I) bromine

c)

lithium bromide

d)

lithuim (I) bromide

34.

Which of the following combinations would need roman numerals in the name?

a)

potassium + fluorine

b)

beryllium + oxygen

c)

boron + iodine

d)

lead + oxygen

35.
What is the correct formula for Sodium Oxide?
a)
NaO
b)
NaO2
c)
Na2O
d)
Na2O2
36.

What is the charge of copper in the compound: CuBr2

a)

+1

b)

+2

c)

-1

d)

-2

37.

What is the what charge of lead in the compound: lead (IV) iodide

a)

+1

b)

+4

c)

+6

d)

-1

38.
phosphorus trichloride
a)
KCl3
b)
PCl3
c)
K3Cl
d)
P3Cl
39.
silicon dioxide
a)
SO2
b)
NaO2
c)
SiO2
d)
SiO
40.
The chemical formula of sulfur hexabromide is
a)
SBr₆
b)
S₆Br
c)
S(VI)Br
d)
S6Br
41.
The chemical formula of dinitrogen textroxide is
a)
Ni₂O₄
b)
NiO
c)
N₂O₄
d)
NiO₂
42.

Sodium reacts with chlorine gas to produce sodium chloride.

a)

NaCl→ Cl + Na

b)

Na+ CO2 → NaCO2

c)

Na + Cl2→ NaCl

d)

Na + Cl → NaCl

43.

Iron reacts with solid sulfur to produce iron(II) sulfide powder.

a)

Fe + S → Fe2S

b)

Fe + S → FeS

c)

Fe2 + S→ Fe2S2

d)

Fe + S2 → Fe2S

44.

When lead reacts with oxygen, a yellow lead(II) oxide powder is produced.

a)

Pb + O2 → PbO

b)

Pb + O2→ PbO2

c)

Pb2 + O2→ Pb2O

d)

Pb + O → PbO

45.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
46.
Is this balanced?
Al + O2 → 2Al2O3
a)
Yes
b)
No
47.
Which number should go in the blank?
Al(NO3)3 + _  NaOH -> Al(OH)3 + 3 NaNO3
a)
1
b)
2
c)
3
d)
0
48.

Balance this equation

_Al +_HCl --> _H2 +_AlCl3

a)

2,6,3,2

b)

it's already balanced

c)

4,12,3,4

d)

2,1,4,5

49.

This ion is responsible for the properties of acids

a)

Sodium ion

b)

Hydrogen ion

c)

Hydroxide ion

d)

Oxide ion

50.

This ion is responsible for the properties of bases

a)

Sodium ion

b)

Hydrogen ion

c)

Hydroxide ion

d)

Oxide ion

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