NEW
Font size
S
M
L
XL
WorksheetsChemical Reactions
Total questions: 20
Worksheet time: 12mins
Name
Class
Date
1.
Balance this equation: ___ Cl2 + ___ KI → ___ KCl + ___ I2
a)
___ Cl2 + ___ KI → ___ KCl + 2 I2
b)
2 Cl2 + ___ KI → ___ KCl2 + ___ I2
c)
___ Cl2 + 2 KI → 2 KCl + ___ I2
2.
In a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what?
a)
Reactants
b)
Products
c)
Atoms
d)
Catalysts
3.
A reaction that occurs when two or more elements or compounds combine to make a more complex substance is called
a)
double replacement
b)
decomposition
c)
synthesis
d)
single replacement
4.
Balance this equation: H2 + N2 → NH3
a)
H2 + 4N2 → NH3
b)
H2 + 3N2 → 2NH3
c)
3H2 + N2 → 2NH3
d)
2H2 + 2N2 → 2NH3
5.
Occurs when one element replaces another one in a compound
a)
Synthesis
b)
Single replacement
c)
Double replacement
d)
Decomposition
6.
Compounds break down into simpler substances in this type of reaction.....
a)
Double Replacement
b)
Single Replacement
c)
Synthesis
d)
Decomposition
7.
This image represents
a)
a double replacement reaction
b)
a decomposition reaction
c)
a single replacement reaction
d)
a complex compound reaction
8.
This picture represents
a)
Synthesis
b)
Double Replacement
c)
Single Replacement
d)
Decomposition
9.
What is the precipitate formed when you mix silver nitrate with copper chloride?
a)
copper nitrate
b)
copper chloride
c)
silver chloride
d)
silver nitrate
10.
Which list contains only precipitates?
a)
copper hydroxide, lead iodide, calcium carbonate
b)
calcium nitrate, lead sulfate, barium phosphate
c)
sodium nitrate, calcium hydroxide, iron (III) hydroxide
11.
Solid magnesium, Mg, reacts with oxygen gas, O2, to form the solid magnesium oxide, MgO. Which equation is a balanced chemical equation for this chemical change?
a)
2Mg + O2 → 2MgO
b)
Mg + 2O → 2MgO
c)
Mg + O2 → MgO2
d)
Mg + O → MgO
12.
What type of reaction produces a precipitate?
a)
single displacement
b)
synthesis
c)
double displacement
d)
decomposition
13.
In the reaction
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________
a)
Reduced
b)
Synthesized
c)
Oxidized
d)
None of the above
14.
What is released in a combustion reaction?
a)
Oxygen and water
b)
Oxygen and carbon dioxide
c)
Carbon dioxide and water
d)
Water and hydrogen
15.
Which reactant correctly balances the following equation: 4Al + __ -> 2Al2O3?
a)
3O2
b)
O3
c)
3O
d)
2O2
16.
Which of these is a double displacement reaction?
a)
2Mg + O2 > 2MgO
b)
Mg + 2HCl > H2 + MgCl2
c)
MgI2 + K2CO3 > MgCO3 + 2Kl
d)
MgCO3 > MgO + CO2
17.
When a substance in a chemical equation is followed by (aq), it means that the substance is...
a)
a catalys
b)
dissolved in water
c)
a liquid
d)
a product
18.
What are the products for the reaction between F2 + KCl
a)
FCl + K
b)
KF + Cl2
c)
KF + Cl
d)
no reaction
19.
What are the products when Na2O and H2O react
a)
NaOH
b)
NaO + HO
c)
H2O + NaO2
d)
Na2OH2O
20.
What type of reaction occurs between O2 and Ca(ClO3)2?
a)
single replacement
b)
synthesis
c)
decomposition
d)
double replacement
Reset
