Free Printable Chemical Reactions #2

1.

Which of the following equations is NOT balanced?

a)

$Fe\ \ +\ \ S\ \ \rightarrow\ \ FeS$

b)

$KOH\ +\ HCl\ \rightarrow\ KCl\ +\ H_2O$

c)

$2Mg\ +\ O_2\ \rightarrow\ 2MgO$

d)

$NaCl\ +\ H_2SO_4\ \rightarrow\ Na_2SO_4\ +\ HCl$

2.

The decomposition of water is called

a)

combustion

b)

electrolysis

c)

synthesis

d)

oxidation

3.

Which of the following represents a double displacement reaction between sodium chloride and silver fluoride?

a)

$NaCl\ \ +\ AgF\ \rightarrow\ NaAgF\ +\ Cl$

b)

$NaCl\ +\ AgF\ \rightarrow\ NaF\ +\ AgCl$

c)

$NaCl\ +\ AgF\ \rightarrow\ Ag\ +\ NaClF$

d)

$NaCl\ +\ AgF\ \rightarrow\ NaF\ +\ Cl_2\ +\ Ag$

4.

A synthesis reaction between magnesium (Mg) and oxygen (O2) might produce

a)

$Mg_2$

b)

$O_4$

c)

$MgO$

d)

$MgCO_2$

5.

A substance that undergoes a change in a chemical reaction is

a)

a product

b)

a chemical

c)

a reactant

d)

an enzyme

6.

In an exothermic reaction, energy is transferred from

a)

the reactants to the surroundings

b)

one reactant to another

c)

the surroundings to the reactants

d)

the container to the chemicals

7.

A synthesis reaction is a reaction between at least two compounds in which

a)

one breaks down into at least two products

b)

a compound is decomposed by an electric current

c)

a compound burns in the presence of oxygen

d)

a single new, more complex compound is formed

8.

The product of the synthesis reaction between sodium and chlorine gas is

a)

polyethylene

b)

carbon dioxide

c)

sodium chloride

d)

copper (II) chloride

9.

A chemical equation is balanced by changing or adding

a)

chemical symbols

b)

subscripts

c)

coefficients

d)

reactants

10.

In a balanced chemical reaction, the total mass of the products always equals the

a)

molar mass of the reactants

b)

atomic mass of the reactants

c)

total mass of the reactants

d)

proportional masses of the reactants

11.

What happens in a chemical reaction?

a)

atoms are destroyed

b)

atoms are created

c)

atoms are heated and cooled

d)

atoms are rearranged

12.

Which statement about endothermic reactions is correct?

a)

Energy is always created in the form of heat

b)

Energy is transferred from the surroundings to the reactants (absorbed)

c)

Energy is used to force electrons to move to higher levels

d)

Energy is transferred from the reactants to the surroundings (released)

13.

When water is broken down by electrolysis, the products are

a)

water and carbon dioxide

b)

hydrogen and oxygen gas

c)

hydrogen and oxygen ions

d)

oxygen and methane

14.

A balanced chemical equation indicates both the number of particles of reactants and products and the number of

a)

orbits

b)

electrons

c)

nuclei

d)

moles

15.

What is the general form for a synthesis reaction?

a)

$AB\ \ \rightarrow\ \ A\ \ +\ \ B$

b)

$A\ \ +\ B\ \rightarrow\ AB$

c)

$AX\ +\ BY\ \rightarrow\ AY\ +\ BX$

d)

$AX\ +\ B\ \rightarrow\ A\ +\ BY$

Chemical Reactions #2

Total questions: 15

Worksheet time: 8mins

Similar Resources on Wayground