wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

Practice Test - Energy in Chemical Reactions

Total questions: 50

Worksheet time: 1hrs 5mins

Name
Class
Date
1.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
2.
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
3.
Is photosenthysis an Exothermic or an Endothermic reaction?
a)
Endothermic
b)
Exothermic
4.
What type of reaction is shown in the photo?
a)
Exothermic
b)
Isothermic
c)
Endothermic
d)
None of the  above
5.

____ reactions usually feel cold.

a)

endothermic

b)

exothermic

6.

Elements in two different compounds switch places.

a)

Synthesis

b)

decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

7.

When two or more substances combine to form one​​

substance.

a)

Synthesis

b)

Decompostion

c)

Single Replacement

d)

Double Replacement

e)

Combustion

8.

When one substance ​​breaks down into 2 or more

substances.

a)

Synthesis

b)

Decompostion

c)

Single Replacement

d)

Double Replacement

e)

Combustion

9.

When one element replaces another element in a compound.

a)

Single replacement

b)

Double Replacement

c)

Synthesis

d)

Decompostion

e)

Combustion

10.
Which of the following is the general formula for a decomposition reaction?
a)
A + B  → AB
b)
AB → A + B
c)
AB + C → AC + B
d)
AB + CD → AC + BD
11.
In an endothermic reaction, heat is ...
a)
taken in or absorbed
b)
given out or released 
12.
In an exothermic reaction, heat is ...
a)
taken in or absorbed
b)
given out or released
13.

What is law of conservation of mass ?

a)

Mass of reactants = mass of products

b)

mass of reactants > mass of the products

c)

mass of the reactants < mass of the products

d)

mass of reactants > 2 mass of the reactants

14.

During an exothermic reaction, heat is _________ and chemical bonds __________.

a)

released, formed

b)

absorbed, broken

c)

released, broken

d)

absorbed, formed

15.

During an endothermic reaction, heat is ________ and chemical bonds _______.

a)

released, formed

b)

absorbed, broken

c)

released, broken

d)

absorbed, formed

16.

Endo means in or _______.

a)

absorbed

b)

released

17.

Exo means out or ________.

a)

absorbed

b)

released

18.
What is essential for a combustion reaction to begin?
a)
Carbon dioxide
b)
Fuel 
c)
Fuel, oxygen and heat
d)
Water and oxygen
19.

What are the products of combustion?

a)

Hydrogen + oxygen

b)

Carbon dioxide + water

c)

Carbon dioxide + hydrogen

d)

Carbon + water

20.

Which substance is a reactant in every combustion reaction?

a)

Carbon dioxide

b)

butane

c)

oxygen

d)

water

21.
What type of reaction occurs in a hand warmer
a)
exothermic
b)
endothermic
22.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
23.

In an endothermic reaction, heat is ...

a)

taken in

b)

given out

24.
Consider the chemical equation CH4 + 2 O2 → CO2 + 2 H2O. In this equation, CH4 is a
a)
product
b)
reactant
c)
displacement
25.
What is the right part of a chemical equation called?
H2 + O → H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
26.
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
27.

Which type of reaction has the following general pattern?

ABC → A + B + C

a)

synthesis

b)

combustion

c)

decomposition

d)

endothermic

28.
3Ca + 2AlCl3 --> 3CaCl2 + 2Al
a)
Synthesis
b)
Decomposition
c)
Single diplacement
d)
Double displacement
29.
3KOH + H3PO4 --> K3PO4 + 3H2O
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Double displacement
30.
The following reaction is an example of what reaction type? 
CoCO3 → CoO + CO2
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
31.

AgF + CaCl2 ---> AgCl + CaF2

a)

double replacement

b)

decomposition

c)

single replacement

d)

synthesis

32.

What is a chemical reaction?

a)

a change in matter when the molecules rearrange to make new molecules

b)

a change in matter when matter changes its form or appearance

c)

a change in matter when the physical appearance changes

d)

a very boring change in matter

33.

When energy like heat and light are given off in a chemical reaction it is called

a)

exothermic

b)

endothermic

c)

eccentric

d)

ectomorphic

34.

When the matter in a chemical reaction gets colder it is called

a)

exothermic

b)

endothermic

c)

eccentric

d)

endomorphic

35.

When the matter in a chemical reaction gets warmer it is called

a)

exothermic

b)

endothermic

c)

eccentric

d)

endomorphic

36.
Breaking down a substance into simpler substances
a)
Displacement
b)
Synthesis
c)
Decomposition
d)
Oxidation
37.
What type of reaction is the equation C + O2 → CO2?
a)
Synthesis Reaction
b)
Decomposition Reaction
c)
Single Displacement Reaction
d)
Double Displacement Reaction
38.
What type of reaction is the equation 2NaCl →2Na +Cl2?
a)
Synthesis Reaction
b)
Decomposition Reaction
c)
Single Displacement Reaction
d)
Double Displacement Reaction
39.
Which generalized equation represents a decomposition reaction?
a)
A + BC → AC+ B
b)
A + B → AB
c)
AB → A + B
40.
Which generalized equation represents a single displacement reaction?
a)
A + BC → AC+ B
b)
A + B → AB
c)
AB → A + B
41.

What type of reaction involves the breaking down of a substance into simpler substances?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

42.

What type of reaction involves 2 substances combining to form 1 new compound?

a)

Decomposition Reaction

b)

Single Replacement Reaction

c)

Double Replacement Reaction

d)

Synthesis Reaction

43.

What type of reaction involves the breaking down of a substance into simpler substances?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

44.

What type of chemical reaction is this one?

CUO + CO2 --> CuCO3

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

45.

What type of chemical reaction is this one?

Ca + MgCl2 --> CaCl2 + Mg

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

46.

3KOH + H3PO4 --> K3PO4 + 3H2O

a)

Combination

b)

Decomposition

c)

Single replacement

d)

Double replacement

47.
CxHy +O2 --> H2O + CO2
a)
Decomposition
b)
Double replacement
c)
Combustion
d)
Single Replacement
48.

Combustion reactions will always involve

a)

Oxygen and a solid

b)

Liquid nitrogen and heat

c)

Oxygen and heat/energy

d)

CO and H2O

49.
What kind of reaction is this:
Fe + CuSO4 -> Cu + FeSO4
a)
Double Replacement
b)
Decompostion
c)
Single Replacement
d)
Combustion
50.

Which chemical reaction always starts with a hydrocarbon that reacts with oxygen and produces carbon dioxide and water?

a)

Decomposition

b)

Synthesis

c)

Combustion

d)

Single Replacement

Similar Resources on Wayground

Physical vs Chemical changes and properties

50 questions

Physical vs Chemical changes and properties

quiz

Worksheet

•

8th - 12th Grade

PIA Matter and its transformations

50 questions

PIA Matter and its transformations

quiz

Worksheet

•

8th Grade

Comprehensive Phy. Science Review

46 questions

Comprehensive Phy. Science Review

quiz

Worksheet

•

6th - 11th Grade

SOL Module 5: Force, Motion, Energy & Matter

51 questions

SOL Module 5: Force, Motion, Energy & Matter

quiz

Worksheet

•

6th - 8th Grade

spm past year chemistry paper 1 (2010)

50 questions

spm past year chemistry paper 1 (2010)

quiz

Worksheet

•

KG - Professional Dev...

Chemical Vs Physical Changes

46 questions

Chemical Vs Physical Changes

quiz

Worksheet

•

6th Grade

Chemistry Pre-Assessment

52 questions

Chemistry Pre-Assessment

quiz

Worksheet

•

6th - 8th Grade

Chemistry Bonding and Balancing

49 questions

Chemistry Bonding and Balancing

quiz

Worksheet

•

8th - 9th Grade