Chemical Reactions Quiz

Which type of reaction involves the transfer of electrons?

• Synthesis

• Redox

• Decomposition

• Double decomposition

What characterizes a reversible reaction?

• It releases heat.

• It can proceed in both forward and backward directions.

• It absorbs heat.

• It involves the exchange of electrons.

In an endothermic reaction, what happens to energy?

• It is released.

• It is absorbed.

• It is unchanged.

• It is converted to matter.

In a redox reaction, what happens to the oxidant?

• Gains electrons

• Loses electrons

• Gains protons

• Loses protons

What is a direct combination reaction also known as?

• Decomposition

• Synthesis

• Displacement

• Redox

In an exothermic reaction, how is the energy change usually represented in the reaction equation?

• As a reactant

• As a product

• Not shown

• As a catalyst

In a reversible reaction, which condition is often observed?

• Only the forward reaction occurs.

• Only the backward reaction occurs.

• Both forward and backward reactions occur simultaneously.

• The reaction stops at equilibrium.

Which reaction type is characterized by a single element replacing another in a compound?

• Direct combination

• Double decomposition

• Displacement

• Reversible

What is the general form of a direct combination reaction?

• A+B→AB

• AB→A+B

• AB+CD→AD+CB

• A+BC→AC+B

What is an exothermic reaction?

• A reaction that absorbs energy.

• A reaction that releases energy.

• A reaction that neither absorbs nor releases energy.

• A reaction that only occurs at high temperatures.