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Year 10 Chemistry revision

Total questions: 74

Worksheet time: 2hrs 42mins

Name
Class
Date
1.
The following is what type of reaction:
PbCl2 + AgNO3 → Pb(NO3)2 + AgCl
a)

Combination/Synthesis

b)
Decomposition
c)

Single Displacement

d)

Double Displacement

2.
The following is what type of reaction:
NH3 + HCl  → NH4Cl
a)

Combination/Synthesis

b)
Decomposition
c)

Single Displacement

d)

Double Displacement

3.
What is decomposition?
a)
putting substances together
b)
breaking substances apart
c)

element displacing another element in a compound

d)

burning of a substance

4.
3Ca + 2AlCl3 --> 3CaCl2 + 2Al
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
5.
One element replaces another in a compound.
a)

Combination/Synthesis

b)
Combustion
c)

Single Displacement

d)

Double Displacement

6.

Which of the following factors does not affect the rate of a chemical reaction?

a)

Catalysts

b)

Surface area

c)

Temperature

d)

Concentration

e)

Colour of the reactants

7.

The ______ the surface area exposed to a chemical reaction, the ________ the rate of the reaction.

a)

larger, faster

b)

larger, slower

c)

smaller, faster

8.

How does the concentration of reactants and products generally change over time during a chemical reaction?

a)

It stays the same for both reactants and products.

b)

It decreases for reactants and increases for products.

c)

It increases for reactants and decreases for products.

d)

It decreases for reactants and products.

e)

It increases for reactants and products.

9.

Which of the following factors does not affect the rate of a chemical reaction?

a)

Catalysts

b)

Surface area

c)

Temperature

d)

Concentration

e)

Colour of the reactants

10.

The ______ the surface area exposed to a chemical reaction, the ________ the rate of the reaction.

a)

larger, faster

b)

larger, slower

c)

smaller, faster

11.

A student wants to measure the effect of surface area on the reaction of iron with dilute hydrochloric acid. The student performs the experiment several times, using the same mass of iron but changing its surface area. How does the surface area affect the total amount of H2H_2 gas produced?

a)

The total amount of gas produced decreases with increasing the surface area.

b)

The total amount of gas produced increases with decreasing the surface area.

c)

The total amount of gas produced decreases with decreasing the surface area.

d)

The total amount of gas produced increases with increasing the surface are

e)

It has no effect; the total amount of gas produced is always the same.

12.

How does the concentration of reactants and products generally change over time during a chemical reaction?

a)

It stays the same for both reactants and products.

b)

It decreases for reactants and increases for products.

c)

It increases for reactants and decreases for products.

d)

It decreases for reactants and products.

e)

It increases for reactants and products.

13.

The graph below shows how the concentration of a reactant in four different reactions changes over time. Which reaction is the slowest?

a)

A

b)

B

c)

C

d)

D

14.

The graph below shows how the concentrations of reactants and products change during a chemical reaction. Which of the chemical species is likely to be the reactant?

a)

A

b)

B

c)

C

15.

The graph below shows how the concentrations of reactants and products change during a chemical reaction. Which of the chemical species is likely to be the reactant?

a)

A

b)

B

c)

C

16.

A temperature increase causes the particles to ......

a)

to slow down

b)

move faster

c)

collide higher

d)

in the right order

17.

Why does a higher concentration increase the rate of reaction?

a)

it increases the amount of reactants

b)

it lowers the activation energy

c)

it increases the energy of particle collisions

d)

it increases the frequency of particle collisions

18.
What is the rate of reaction?
a)
How fast a reaction is 
b)
How big a reaction is
c)
How loud a reaction is
d)
How much gas a reaction produces
19.

Grinding a effervescent tablet into powder increases the rate of reaction due to increased

a)

concentration

b)

surface area

c)

temperature

d)

reactants

20.

Increasing the temperature gives particles more __________.

a)

Time

b)

Energy

c)

Space

d)

Frequency

21.

As the frequency of ______________ increases, the rate of reaction increases.

a)

Time

b)

Reactions

c)

Collisions

d)

Reactants

22.

The minimum amount of energy needed for colliding particles to react is called

a)

Chemical Energy

b)

Kinetic Energy

c)

Activation Energy

d)

Potential Energy

23.
What type of reaction is this?
a)
Endothermic
b)
Exothermic
24.

List three factors that affect the rate of a reaction

a)

temperature

b)

concentration

c)

surface area

d)

volume

25.
More collisions correspond to a: 
a)
Faster reaction rate  
b)
Slower reaction rate
c)
Constant reaction rate 
d)
None of the above
26.

What criteria must be met for reactant collisions to result in a successful product?

a)

The reactants must collide with each other

b)

The reactants must collide with enough energy and be in the right positions

c)

The reactants must have enough energy to form the activated complex

27.
Products will form faster if____________
a)
the particle size of the reactants are larger.
b)
temperature is decreased.
c)
concentration of the reactants are increased.
d)
the reaction is not stirred.
28.

What is the name of group number 1?

a)

halogens

b)

noble gases

c)

alkali metals

d)

alkaline earth metals

29.

where are the metaloids found

a)

far left, vertical

b)

stair step/diagonal

c)

far right horizontal

d)

at the bottom

30.

Periodic law states that the elements are arranged according to their atomic ________ so that elements with similar chemical properties are in the same ________ and properties repeat periodically.

a)

numbers, rows

b)

masses, rows

c)

masses, column

d)

numbers, column

31.
___________ is the only metal that is a liquid at room temperature.
a)
Platinum
b)
Water
c)
Tin
d)
Mercury
32.
__________ would have some characteristics of metals and some characteristics of nonmetals.
a)
Gold
b)
Sodium
c)
Arsenic
d)
Bismuth
33.

Metals (select all that apply)

a)

are found on the right side of the periodic table.

b)

are found on the left side of the periodic table.

c)

are good conductors of heat and electricity.

d)

are brittle.

e)

are malleable and ductile.

34.

Nonmetals (select all that apply)

a)

are found on the right side of the periodic table.

b)

are found on the left side of the periodic table.

c)

are good conductors of heat and electricity.

d)

are brittle.

e)

can be solid, liquids, or gases at room temperature.

35.

Which element is found in group 2, period 6?

a)

Oxygen (O)

b)

Barium (Ba)

c)

Selenium (Se)

d)

Carbon (C)

36.

Which halogen is found in period 4?

a)

Krypton (Kr)

b)

Xenon (Xe)

c)

Bromine (Br)

d)

Iodine (I)

37.

Elements that have the same number of energy levels are said to be in the same ______.

a)

group

b)

period

c)

family

d)

classification

38.
Two elements chemically bonded form
a)
element
b)
compound
c)
mixture
d)
solutions
39.
What element is will have the most similar physical and chemical properties to the element Sulfur (S)?
a)
Carbon (C)
b)
Phosphorous (P)
c)
Oxygen (O)
d)
Neon (Ne
40.
Elements that are arranged in __________ have the most similar physical and chemical properties to each other.
a)
periods
b)
groups
41.

What is the symbol for the Phosphate ion?

a)

PO42-

b)

PO43-

c)

PO33-

d)

PO32-

42.
What is an ion?
a)
A Charged Atom
b)
A Large Atom
c)
A Small Atom
d)
A Cute Atom
43.
Why are ions formed?
a)
To make our lives difficult
b)
Because atoms want 8 valence electrons
c)
Because atoms have the same number of protons and electrons
d)
Because atoms gained neutrons
44.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
45.

Why do elements form bonds?

a)

to get a charge

b)

so they can make friends

c)

to become stable by getting a full valence shell

d)

to become stable by increasing their mass

46.

Lithium (Li)

a)

Li+

b)

Li2+

c)

Li-

d)

Li2-

47.

Chlorine/de (Cl)

a)

Cl2-

b)

Cl+

c)

Cl-

d)

Cl3-

48.

Hydrogen (H)

a)

H2+

b)

H-

c)

H+

d)

He+

49.

Magnesium (Mg)

a)

Mg+

b)

Mg2+

c)

Mg2-

d)

Mg2-

50.

Oxygen (O)

a)

O2+

b)

O2-

c)

O3-

d)

O+

51.

Helium (He)

a)

He+

b)

He-

c)

Helium doesn't form ions as it has a stable outer cell

d)

He 2+

52.

What charge does an atom have when it GAINS electrons?

a)

Positive

b)

Negative

c)

Neutral

53.

What subatomic particle changes in an ion?

a)

The number of electrons

b)

The number of protons

c)

The number of neutrons

54.

What type of atom is element C?

a)

Normal atom

b)

Ion

c)

Isotope

55.
Sodium has an atomic number of 11, how many protons does this atom have?
a)
22
b)
11
c)
12
d)
2
56.

How many valence electrons ae in the element Carbon?

a)

2 electrons

b)

6 electrons

c)

4 electrons

d)

None of the above

57.

What is an ion?

a)

An atom that has gained or lost an electron.

b)

An atom that has gained or lost a neutron.

c)

An atom that has gained or lost a proton.

d)

An atom that is electrically neutral.

58.

Which of these elements is Helium ?

a)

Protons 13

neutons 14

Electrons 10

b)

Protons 2

Neutrons 2

Electrons 2

c)

Protons 6

Neutrons 7

Electrons 6

59.

Which of these elements is an Isotope ?

a)

A

b)

B

c)

C

d)

D

60.

Which of these elements is Aluminum?

a)

A

b)

D

c)

C

d)

A AND D

61.

Which of these elements is Aluminum?

a)

A

b)

D

c)

C

d)

A AND D

62.

What period does element D a part of?

a)

1

b)

2

c)

3

d)

4

63.

What group is element C a part of?

a)

3

b)

14

c)

5

d)

6

64.

Which of these elements would be considered a metal?

a)

C and D

b)

B and C

c)

A and D

d)

A and B

65.
What is the electron configuration of sodium?
a)
2.8
b)
2.8.2
c)
2.8.1
d)
11
66.
What is the electron configuration of calcium?
a)
2.8.8.2
b)
2.8.10
c)
20
d)
2.18.2
67.
Which element has an electron configuration of 2.5?
a)
Oxygen
b)
Nitrogen
c)
Phosphorus
d)
Carbon
68.
Which element has the electron configuration of 2.8.2?
a)
Magnesium
b)
Sodium
c)
Sulfur
d)
Arsenic
69.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
70.

Valence electrons are located...

a)

inside the nucleus

b)

in outer space

c)

on the outermost orbit of an atom

71.
a)

10

b)

2

c)

8

d)

18

72.
How many valence electrons are represented here?
a)
7
b)
5
c)
2
d)
8
73.

Identify the element.

a)

Ca

b)

Na

c)

Cu

d)

Mg

74.

Which of these elements are metals?

a)

A and D

b)

B and C

c)

A and D and C

d)

A and C

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