Free Printable Chemical Reactions #3

1.

A change in color is a sign that what is taking place?

a)

chemical reaction

b)

chemical absorption

c)

molecular model

d)

word equation

2.

The changes that are visible during a chemical reaction are signs that what is being rearranged in the reactants?

a)

electrons

b)

atoms

c)

products

d)

nuclei

3.

A chemical reaction that transfers energy from the reactants to the surroundings is referred to as

a)

exothermic

b)

endothermic

c)

paleothetic

d)

exergonic

4.

What type of reaction has the reactant broken down into other substances?

a)

synthesis

b)

decomposition

c)

combustion

d)

single replacement

5.

What is the mole ratio in the following equation? $4Fe\ +\ 3O_2\ \rightarrow\ 2Fe_2O_3$

a)

2:3:4

b)

3:4:2

c)

1:2;4

d)

4:3:2

6.

What type of reaction is energy transferred from the surroundings to the reactants

a)

exothermic

b)

polyatomic

c)

endothermic

d)

polygenic

7.

In a chemical reaction atoms are

a)

rearranged

b)

created

c)

destroyed

d)

dissolved

8.

In a combustion reaction, what must always be a reactant?

a)

water

b)

hydrogen

c)

oxygen

d)

sodium

9.

What type of reaction involves the transfer of electrons?

a)

free radical

b)

redox

c)

combustion

d)

synthesis

10.

Which of the following is NEVER used to balance an equation?

a)

coefficients

b)

subscripts

c)

atoms

d)

electrons

11.

What type of reaction is the this $CH_4\ +\ 2O_2\ \rightarrow\ CO_2\ +\ 2H_2O$

a)

synthesis

b)

decomposition

c)

combustion

d)

double displacement

12.

What type of reaction is this $2NH_3\ \rightarrow\ N_2\ +\ 3H_2$

a)

synthesis

b)

decomposition

c)

single displacement

d)

double displacement

13.

What type of reaction is this $2NaCl\ +\ H_2SO_4\ \rightarrow\ Na_2SO_{4\ }+\ 2HCl$

a)

synthesis

b)

decomposition

c)

combustion

d)

double displacement

14.

What type of reaction is this $Fe\ +\ S\ \rightarrow\ FeS$

a)

synthesis

b)

decomposition

c)

single displacement

d)

free radical

15.

What type of reaction is this $2Li\ +\ 2H_2O\ \rightarrow\ 2LiOH\ +\ H_2$

a)

redox

b)

decomposition

c)

single displacement

d)

combustion

Chemical Reactions #3

Total questions: 15

Worksheet time: 45mins

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