Pre TOP 3 Quiz

An ........ undergoes a physical transformation without a chemical reaction. The substance transforms from one form to another by absorbing heat.

• Endothermic process

• Endothermic reaction

• Exothermic process

• Exothermic reaction

The picture is example of...

• Endothermic process

• Endothermic reaction

• Exothermic process

• Exothermic reaction

An ....... does not involve any chemical reaction. Here a compound goes from one phase to another by releasing heat.

• Endothermic process

• Endothermic reaction

• Exothermic process

• Exothermic reaction

That picture is example of ...

• Endothermic process

• Endothermic reaction

• Exothermic process

• Exothermic reaction

Example of a process where no chemical reactions take place is dissolving sodium hydroxide (NaOH), also known as lye and caustic soda, in water (H2O) releases sodium ions (Na+) and hydroxide (OH–) ions along with heat. The compound disassociates in water and releases heat. This is example of...

• Endothermic process

• Endothermic reaction

• Exothermic process

• Exothermic reaction

This is ...

• Endothermic process

• Endothermic reaction

• Exothermic process

• Exothermic reaction

Look at the table. Which are count as exothermic reactions?

• A and C

• A and D

• B and C

• B and D

Why the reaction between magnesium and hydrochloric acid is classified as exothermic?

• It involves solid reactant

• It releases heat

• It take place very quickly

• It produces a gas

Which one is not endothermic process?

• 
• 
• 
• 

When you added the baking soda to the vinegar you will find that the temperature decreased. Why tis reaction classified as endothermic reaction?

• Absorbs energy, causing an increase in temperature of surrounding

• Absorbs energy, causing a decrease in temperature of surrounding

• Releases energy, causing an increase in temperature of surrounding

• Releases energy, causing a decrease in temperature of surrounding