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Chemical reactions

Total questions: 20

Worksheet time: 14mins

Name
Class
Date
1.
What type of chemical reaction takes place when fluorine reacts with sodium bromide?
a)
single replacement 
b)
double replacement 
c)
combustion
d)
synthesis 
2.
What are the correct coefficients when this equation is balanced?
KClO3  --> KCl  +  O2
a)
2,2,2
b)
2,2,3
c)
1,2,3
d)
3,3,3
3.
A metal is reacted with an acid to produce a salt and a hydrogen gas. What type of reaction has occurred? 
a)
neutralization 
b)
double replacement 
c)
single replacement 
d)
synthesis 
4.
Predict the products of the following equation: Mg + AgCl →
a)
No reaction
b)
MgAg + Cl2
c)
products are unpredictable
d)
MgCl2 + Ag
5.
Predict the products of the following reaction: Pb(NO3)2 + 2KI → 
a)
PbI2 + K(NO3)
b)
PbK + I(NO3)
c)
no reaction
d)
PbK(NO3) + I2 
6.
Which type of reaction requires the activity series?
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement and single replacement
7.
2 C5H5 + Fe --> Fe(C5H5)2 
a)
single displacement
b)
double displacement
c)
decomposition
d)
synthesis
8.
2 RbNO3 + BeF2 --> Be(NO3)2 + 2 RbF
a)
single displacement
b)
double displacment
c)
decomposition
d)
synthesis
9.
Balance this equation:  H2 + N2 → NH3
a)
 H2 + 4N2 → NH3
b)
 H2 + 3N2 → 2NH3
c)
 3H2 + N2 → 2NH3
d)
 2H2 + 2N2 → 2NH3
10.

Energy is _____ when new bonds form.

a)

absorbed

b)

released

c)

lost

d)

gained

11.

An _______ reaction is when more thermal energy is absorbed than is released.

a)

endothermic

b)

endergonic

c)

exothermic

d)

exergonic

12.
If the reactants on the left side of a chemical equation are C₃H₈ + 5O₂, the products in a balanced equation could be
a)
4CO₂ + 3H₂O
b)
3CO₂ + 4H₂O
c)
2CO₂ + 3H₂O
d)
3CO + 4H₂O
13.

copper(II)carbonate → ___________ + carbon dioxide

a)

copper(I) oxide

b)

copper(II) oxide

c)

copper oxide

d)

copper(III) oxide

14.

metal hydroxide (+ heat) → ____________ + _________

a)

metal carbonate + water

b)

metal oxide + carbon dioxide

c)

carbon dioxide + water

d)

metal oxide + water

15.

______________ (+ heat) → zinc oxide + carbon dioxide

a)

zinc carbonate

b)

zinc oxide

c)

zinc dioxide

d)

zinc hydrogen carbonate

16.

What type of reaction is this?

Al(OH)3 → Al2O3 + H2O

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

17.

Predict the products for the following reaction:

Ca + P →

a)

CaP

b)

Ca2P3

c)

Ca3P2

d)

CaP + Ca3P2

18.

Identify the reaction type:

2H2O --> 2H2 + O2

a)

Thermal decomposition

b)

Photolytic decomposition

c)

Electrolytic decomposition

d)

Thermal dissociation

19.

On heatingLead nitrate crystals two gases are evolved, one is colourless and the other is brown in colour. Which gases are they?

a)

Oxygen and nitrogen dioxide

b)

Hydrogen and lead oxide

c)

Hydrogen and oxygen

d)

Oxygen and nitrous oxide

20.

Choose the suitable diagram for a monovalent metallic element.

a)
b)
c)
d)

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