Investigating carbonates

The chemical compound found in chalk and marble

• Potassium carbonate

• Calcium carbonate

• magnesium carbonate

Choose the element which is not found in Calcium carbonate

• Calcium

• Carbon

• Hydrogen

Lime is a chemical compound of

• Calcum carbonate

• Calcium Oxide

• Calcium sulphate

Colour of copper carbonate is

• red

• bllue

• green

Colour of copper oxide is

• Black

• Blue

• Red

Most carbonates break down when they are heated. This kind of reaction is called thermal decomposition. Which is the right equation for the the decomposition of calcium carbonate.

• CaCO3 --> CaO+ H2O

• CaCO3 --> CaO+ CO2

• CaCO3 --> Ca+ CO2

Which of the following can be formed when calcium carbonate reacts with acid?

• Carbon

• Oxygen

• Carbon dioxide

Which of the following contains calcium carbonate?

• Plastic

• Meat

• Egg shell

Word equation for the thermal decomposition of copper carbonate is

• Copper Carbonate--> Copper oxide + Oxygen

• Copper Carbonate--> Copper + Oxygen

• Copper Carbonate--> Copper oxide + Carbon dioxide

Which compound is used as baking soda for making cakes

• Calcium carbonate

• Sodium bi carbonate

• Magnesium carbonate