wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

ATS Radical Reactions Revision

Total questions: 89

Worksheet time: 4hrs 51mins

Name
Class
Date
1.

An element is made up of ___ ____ __ ____

(a)  

2.

This is an example of a

a)

Element

b)

Compound

c)

Mixture

3.

Boiling water is an example of

a)

Physical Change

b)

Chemical Change

c)

Either Physical or Chemical Change

4.

Burning/Fire is always a sign of

a)

Physical Change

b)

Chemical Change

c)

Either Physical or Chemical Change

5.

What type of change is more easily reversed?

a)

Physical Change

b)

Chemical Change

6.

If a substance changes temperature (when it is not being heated or cooled) this is a

a)

Physical Change

b)

Chemical Change

c)

Either Physical or Chemical Change

7.

Which change describes a substance that changes shape, form, or appearance but is still the same substance?

a)

physical change

b)

chemical change

8.

What happens when a new substance is produced during a reaction?

a)

chemical change

b)

physical change

9.

Match the following

a)

Endothermic

1.

The reaction absorbs energy from the surroundings

b)

Exothermic

2.

The reaction releases energy to the surroundings

c)

Catalyst

3.

Increases the rate of a reaction by reducing the required activation energy

d)

Activation Energy

4.

The amount of energy needed to get a reaction to start

10.

Select all the reactants

a)
b)
c)
11.

What is underlined in the chemical equation below?

Na + Cl ---> NaCl

a)

Products

b)

Reactants

12.

In the chemical equation below, the product is....

Na + Cl ---> NaCl

a)

Na

b)

NaCL

c)

Cl

d)

NaCl

13.

Select all the Reactants

a)
b)
c)
14.

Select all the reactants

a)
b)
c)
15.
Substances that form as the result of a chemical reaction
a)
products
b)
reactants
c)
coefficients
d)
subscripts
16.
Substances present at the start of a chemical reaction
a)
subscripts
b)
coefficients
c)
reactants
d)
products
17.
A candle wick burning is an example of a _________________________
a)
physical reaction
b)
condensation
c)
neutrons
d)
chemical reaction
18.

A product is a new compound or molecule

a)

True

b)

False

19.

A reactant is always on the right

a)

False

b)

True

20.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
21.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
22.

What is the Law of Conservation of Mass?

a)

Mass is created in a chemical reaction

b)

Mass is created in a physical change

c)

New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

d)

Mass is never created or destroyed

23.

In reaction A +B --> C, reactants A + B have a total mass of 9g. What is the mass of product C?

a)

4g

b)

5g

c)

9g

d)

14g

24.

In reaction A +B --> C, reactant A has a mass of 4g and product C has a mass of 9g. What is the mass of reactant B

a)

4g

b)

5g

c)

9g

d)

14g

25.

In reaction A +B --> C, reactant B has a mass of 9g and product C has a mass of 14g. What is the mass of reactant A?

a)

4g

b)

5g

c)

9g

d)

14g

26.

24 g of magnesium reacts with 38 g of fluorine to produce ______ g of magnesium fluoride

a)

14

b)

24

c)

38

d)

62

27.

7 g of hydrogen reacts with 17 g of oxygen to produce ______ g of water

a)

14

b)

24

c)

38

d)

62

28.

12.67 g of Carbon reacts with 25.33 g of oxygen to produce ______ g of Carbon Dioxide

a)

14

b)

24

c)

38

d)

62

29.

How many sulfur atoms must be present in the products after a reaction between the following reactants: 2SO2 +2H2O22SO_2\ +2H_2O_2  

a)

2

b)

3

c)

4

d)

8

30.

How many Hydrogen atoms must be present in the products after a reaction between the following reactants: 2SO2 +2H2O22SO_2\ +2H_2O_2  

a)

2

b)

3

c)

4

d)

8

31.
Which  of the following is a balanced equation?
a)
Na   +   Cl2   -->  NaCl
b)
H2  +  O2  --> H2O
c)
Ca   +   Br  -->  CaBr2
d)
Na   +  F  -->  NaF
32.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
33.
Is the following equation balanced?...
Al + O2 --> 2Al2O3
a)
Yes!
b)
No!
34.
Balance this equation.
_CH4 + _O2 --> _CO2 + _H2O
a)
1,2,1,1
b)
2,1,2,1
c)
1,2,1,2
d)
0,2,0,2
35.

Balance this equation, CaCO3(s) → CaO(s) + CO2(g)?

a)

3,1,2

b)

1,1,1

c)

1,3,1

d)

2,6,3

36.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
37.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
38.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
39.

According to the Law of Conservation of mass the mass of the _________ must equal the mass of the _________.

a)

compounds, mixtures

b)

reactants, products

c)

elements, chemicals

d)

substances, destroyed

40.

To balance the following equation, what coefficient should be in front of the Ag2OAg_2O ?
____ Ag2OAg_2O   🡪 ____ Ag + ____ O2O_2  

a)

1

b)

2

c)

3

d)

4

41.
Which number should go in the blank?
_ H2 + O2 -> 2 H2O
a)
1
b)
2
c)
3
d)
0
42.
Is the following equation balanced or unbalanced ? 
N2 +3 H2 --> 2NH3
a)
Balanced
b)
Unbalanced
43.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
44.
How many Oxygen atoms are in 4H2O?
a)
4
b)
1
c)
0
d)
8
45.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
46.

In an endothermic reaction, heat is ...

a)

taken in

b)

given out

47.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 
a)
Warm
b)
Cold
48.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
49.
What type of reaction is shown in the photo?
a)
Exothermic
b)
Isothermic
c)
Endothermic
d)
None of the  above
50.

What type of reaction occurs in a hand warmer?

a)

exothermic

b)

endothermic

51.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

52.

____ reactions usually feel cold.

a)

endothermic

b)

exothermic

53.
When iron nails get rusty, heat is released.  What process is this?
a)
Exothermic
b)
Endothermic
54.

What does catalyst do to a reaction?

a)

Slows down the reaction

b)

Nothing changes

c)

Speeds up the reaction

55.

What do you call the energy that is required to start a reaction?

a)

Alternative energy

b)

Activation energy

c)

Atmospheric energy

56.

Which of the following is a sign that a chemical reaction has occurred?

a)

change in shape

b)

melting

c)

there was colour change

d)

dissolving

57.

The initial temperature was measured to be 20oC and the final temperature was 45oC. The reaction was

a)

exothermic

b)

endothermic

58.

The initial temperature was measured to be 20oC and the final temperature was 10oC. The reaction was

a)

exothermic

b)

endothermic

59.

The required energy to start a reaction is called...

a)

initiation energy

b)

starting energy

c)

activation energy

d)

key energy

60.

How does a catalyst work in speeding up a reaction?

a)

By lowering the activation energy or reaction

b)

by giving them more energy

c)

by making them more available

61.

A substance that increases the rate of a reaction without being used up during the reaction is called a

a)

catalyst

b)

product

c)

reactant

d)

solute

62.

What is the name given to a catalyst in the human body?

a)

Biology

b)

Catalyst

c)

Chemical

d)

Enzyme

63.

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

a)

Chemical Energy

b)

Kinetic Energy

c)

Activation Energy

d)

Potential Energy

64.
What is an ore?
a)
a solid metal
b)
a rock cantaining a metal combined with other elements
c)
an element
d)
an object used to row a boat
65.
Which of these elements is unlikely to be found native?
a)
gold
b)
platinum
c)
aluminium
d)
silver
66.
Which element cannot be extracted from its ore by reduction with carbon?
a)
iron
b)
aluminium
c)
copper
d)
lead
67.
Which series is used to predict the reactions of metals with carbon and other elements?
a)
reactionary series
b)
reaction series
c)
redox series
d)
reactivity series
68.
What is the name of the process that uses electricity to separate the elements in a compound?
a)
reduction
b)
electrolysis
c)
extraction
d)
mining
69.
How could you extract sodium from molten sodium chloride?
a)
reduction by carbon
b)
electrolysis
c)
decomposition
d)
oxidation
70.

Which of these elements is unlikely to be found in a pure form?

a)

gold

b)

platinum

c)

aluminium

d)

silver

71.

Which of these metals is most likely to be found locked in an ore?

a)

silver

b)

gold

c)

potassium

d)

platinum

72.
Which statement is correct about extraction of iron from its ore?
a)
Iron is more difficult to extract than copper
b)
Iron is the easiest metal to extract
c)
Iron cannot be extracted from its ore
73.
Name a metal that could be extracted from its metal oxide by heating with carbon.
a)
iron
b)
aluminium
c)
gold
d)
magnesium
74.

What does it mean by extraction of metals?

a)

the process of determining which metal to extract based on reactivity series of metals

b)

the process to separate metals from non-metals from

their ores

c)

the process to obtain metals such as iron from

their ores

d)

the process to get rid of metals such as iron

75.

What is the method of extraction for metals higher than

carbon in the reactivity series of metals?

a)

reduction of metal oxides

by carbon

b)

electrolysis

c)

oxidation of metal oxides

by carbon

d)

direct heating of the

metallic compounds

76.

Magnesium chloride + Sodium → ?

a)

Sodium chloride + Magnesium

b)

Magnesium chloride + Sodium (No change)

c)

Sodium magnesium + Chlorine

d)

Magnesium sodium chloride

77.

Why are aluminium and copper used in electrical wires?

a)

More affordable than silver

b)

Excellent conductivity

c)

Low resistance

d)

High densisty

78.

What is the relative formula mass (RFM or Mr) of water (H₂O)?

a)

18

b)

20

c)

16

d)

17

e)

19

79.

Calculate the RFM of carbon dioxide (CO₂)



(a)  

80.

What is the relative formula mass of hydrated magnesium sulphate, MgSO4.7H2O?


[Relative atomic mass : H = 1, O = 16, Mg = 24 , S = 32]

a)

145

b)

150

c)

239

d)

246

81.

Calculate the relative molecular mass for HClHCl .
[RAM: H = 1; Cl = 35.5]

a)

37.5

b)

36.5

c)

34.5

82.

Find the relative formula mass of Na2CO3Na_2CO_3 .

[RAM; C = 12; O = 16; Na = 23]

a)

83

b)

90

c)

106

83.

What is the relative formula mass of ammonium nitrate,  NH4NO3?NH_4NO_3?  
[Relative atomic mass: N = 14; H = 1; O = 16]

a)

76

b)

79

c)

80

d)

90

84.
Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.
a)
1.16%
b)
116%
c)
85%
d)
76%
85.
A reaction was predicted to produce 32.4 grams of a compound. When the product was measured, there were only 26.1 grams made. What is the percent yield?
a)
80.6%
b)
6.3%
c)
24.1%
d)
58.5%
86.
When reacting Na with Cl2, we calculated that the theoretical yield should be 12.5 grams. Our actual yield was 13.0 grams. What is the percent yield?
a)
100%
b)
104%
c)
96%
d)
1.04
87.
Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.
a)
1.16%
b)
116%
c)
85%
d)
76%
88.
In a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 10.1 grams. What is his percent yield?
a)
82%
b)
0.82%
c)
10.1 %
d)
100%
89.

The theoretical yield of a reaction is 237 grams, but the reaction actually yields 26 less grams than expected. What is the percent yield?

a)

17.6%

b)

82.4%

c)

89.0%

d)

121.3%

Similar Resources on Wayground

1st Semester Final

94 questions

1st Semester Final

quiz

Worksheet

•

8th Grade

ECM and Periodic Table Review

85 questions

ECM and Periodic Table Review

quiz

Worksheet

•

8th Grade

Science 8 Online Revision 7: SE 2

85 questions

Science 8 Online Revision 7: SE 2

quiz

Worksheet

•

8th Grade

Big Bang Prior Knowledge Presentations test

84 questions

Big Bang Prior Knowledge Presentations test

quiz

Worksheet

•

7th - 12th Grade

M2 Revision: Motion- Distance- Displacement

90 questions

M2 Revision: Motion- Distance- Displacement

quiz

Worksheet

•

6th - 8th Grade

Physics Game

85 questions

Physics Game

quiz

Worksheet

•

8th - 9th Grade

Science 8:Quiz.04.01

91 questions

Science 8:Quiz.04.01

quiz

Worksheet

•

8th Grade

KS3 Year 8 Mock Revision

93 questions

KS3 Year 8 Mock Revision

quiz

Worksheet

•

7th - 9th Grade