# Chemical Reactions: Question Preview (ID: 2289)

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**Which list includes three types of chemical reactions?**

a) condensation, double replacement, sublimation

b) decomposition, solidification, sublimation

c) decomposition, double replacement, synthesis

d) condensation, solidification, synthesis

**Given the balanced equation: 2 KClO3 --> 2 KCl + 3 O2. Which type of reaction is represented by this equation?**

a) synthesis

b) double replacement

c) single replacement

d) decomposition

**Given the incomplete equation: 4 Fe + 3 O2 --> 2X. Which compound is represented by X?**

a) FeO

b) Fe3O4

c) Fe3O2

d) Fe2O3

**Which metal reacts spontaneously with a solution containing zinc ions?**

a) magnesium

b) silver

c) copper

d) nickel

**Given the reaction: Mg + 2 AgNO3 --> 2 Ag + Mg(NO3)2. What type of reaction is represented?**

a) synthesis

b) double replacement

c) single replacement

d) decomposition

**Given the unbalanced equation _Fe2O3 + _CO --> _Fe + _CO2. When the equation is correctly balanced using the smallest whole-number coefficients, what is the coefficient of CO?**

a) 1

b) 4

c) 3

d) 2

**If an equation is balanced properly, both sides of the equation must have the same number of**

a) atoms

b) moles of molecules

c) molecules

d) coefficients

**What is the total number of oxygen atoms in the formula MgSO4вЂў7H2O? [The вЂў represents**

a) 11

b) 4

c) 5

d) 7

**The burning of magnesium involves the conversion of**

a) chemical energy to mechanical energy

b) chemical energy to heat energy

c) heat energy to chemical energy

d) heat energy to mechanical energy

**Given the unbalanced equation: _Al + _O2 --> _Al2O3. When this equation is correctly balanced using smallest whole numbers, what is the coefficient of O2(g)?**

a) 6

b) 2

c) 3

d) 4

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