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Chemical Reactions Assessment 2 Practice

Total questions: 16

Worksheet time: 10mins

Name
Class
Date
1.
Which reaction type produces only one product?
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
e)
combustion
2.
Which reaction type starts with only one reactant?
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
e)
combustion
3.
Which reaction type is a reaction of a fuel with oxygen that always produces water and carbon dioxide?
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
e)
combustion
4.
Which reaction type shows one element trading places with another element? Each side of the equation has one element and one compound.
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
e)
combustion
5.
Which reaction type shows two elements trading places? Each side of the equation has two compounds.
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
e)
combustion
6.
Which equations show synthesis reactions?
a)

Fe + S --> FeS

b)

2Mg + O2 --> 2MgO

c)

2Na + Cl2 --> 2NaCl

d)

C+O2 -- CO2

e)

2MgO --> 2Mg + O2

7.
Which equations show decomposition reactions?
a)

CaO + CO2 --> CaCO3

b)

2H2O2 --> 2H20 +O2

c)

2KClO3 --> 2KCl + 3O2

d)

H2CO3 --> H2O + CO2

e)

2AgBr --> 2Ag + Br2

8.
Which equations show single replacement reactions?
a)

Mg + 2HCl --> MgCl2 + H2

b)

2K + 2H2O --> 2KOH + H2

c)

Cl2 + CaI2 --> CaCl2 + I2

d)

Zn + 2HCl --> ZnCl2 + H2

e)

FeS + 2HCl --> FeCl2 + H2S

9.
Which equations show double replacement reactions?
a)

Na2S + 2HCl --> 2NaCl +H2S

b)

AgNO3 + NaCl --> AgCl + NaNO3

c)

KBr + AgNO3 --> KNO3 + AgBr

d)

HCl + NaOH --> NaCl + H2O

e)

Zn + 2HCl --> ZnCl2 + H2

10.

Lithium (Li) reacts with hydrochloric acid (HCl) to produce hydrogen gas (H2) and lithium chloride (LiCl). Write a chemical equation that shows this reaction. Balance the chemical equation and identify which type of reaction this represents.

a)

2Li + 2HCl --> H2 + 2LiCl ; Single Replacement

b)

Li + HCl --> H2 + LiCl ; Single Replacement

c)

2Li + 2HCl --> H2 + 2LiCl ; Double Replacement

11.

A burning candle is an example of which form of chemical reaction?

a)

Exothermic

b)

Endothermic

12.

A baking soda and vinegar reaction is an example of which form of chemical reaction?

a)

Exothermic

b)

Endothermic

13.
Look at the graph. Which type of reaction does this show? The products have more energy than the reactants.
a)
Endothermic
b)
Exothermic
14.
Look at the graph. Which type of reaction does this show? The products have less energy than the reactants.
a)
Endothermic
b)
Exothermic
15.
How could we make this reaction happen more quickly?
a)
Crush the chalk to increase the surface area
b)
Decrease the concentration of the acid
c)
Put the test tube in an ice bath
16.
Which of the following increase the reaction rate?
a)
less surface area
b)
lower temperature
c)
increased concentration
d)
an inhibitor

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