Understanding Thermal Decomposition

What does 'thermal' in thermal decomposition refer to?

• Pressure

• Heat

• Light

• Electricity

What is the result of a thermal decomposition reaction?

• A chemical breaks down into two or more different chemicals.

• Two chemicals combine to form a new compound.

• A single chemical remains unchanged.

• A chemical changes color without changing its composition.

Which compound is used as an example of thermal decomposition?

• Magnesium Oxide

• Hydrogen Peroxide

• Calcium Carbonate

• Sodium Chloride

What are the products of heating calcium carbonate?

• Calcium Hydroxide and Carbon Dioxide

• Calcium Oxide and Carbon Monoxide

• Calcium Oxide and Carbon Dioxide

• Calcium and Carbon

What is a key indicator of a thermal decomposition reaction?

• There is only one reactant involved.

• The reaction can only occur in a liquid state.

• The reaction requires sunlight.

• The reaction produces heat.

What indicates a chemical reaction during thermal decomposition?

• Change in temperature

• Production of a gas and a color change

• Formation of a precipitate

• Release of light

What happens to copper carbonate upon heating?

• It remains unchanged.

• It decomposes into copper oxide and carbon dioxide.

• It turns into copper oxide and oxygen.

• It reacts with the Bunsen burner flame.

Which of the following is not a product of thermal decomposition of metal carbonates?

• Both Metal Oxide and Carbon Dioxide are products

• Water

• Carbon Dioxide

• Metal Oxide

What color does copper oxide appear as after the decomposition of copper carbonate?

• Green

• Blue

• Black

• White

Why is the production of gas and a color change important in identifying a chemical reaction?

• It indicates a physical change.

• It confirms the presence of heat.

• It signifies a chemical reaction has occurred.

• It shows the reactant is stable.