7th Grade End of term

Which of the following is the correct chemical symbol for copper?

• C

• Co

• Cu

• Ca

What is the most likely pH of a strong alkali?

• 1

• 7

• 8

• 14

Which is an example of a ceramic material?

• copper

• glass

• polyethlene

• rubber

When green copper carbonate is heated it undergoes a reaction called thermal decomposition. The products of the reaction are a black solid and a colourless gas. Tick the names of the two products.

• carbon

• carbon dioxide

• copper

• copper oxide

• oxygen

Which one of the following metals is in Group 1 of the Periodic Table?

• Al

• Cu

• Mg

• Na

acid + metal carbonate → ........................................................................... + water + carbon dioxide

What gas is used to fill air baloons nowadays?

• CH4

• CO2

• He

• H2

Calcium metal reacts with oxygen to form calcium oxide, which is a white solid. Which is the correct chemical equation for this reaction?

• Ca(s) + O2 (g) → CaO(s)

• 2Ca(s) + O2 (s) → 2CaO(g)

• Ca(s) + O(g) → CaO(s)

• 2Ca(s) + O2 (g) → 2CaO(s)

Which property of copper makes it suitable for making a saucepan?

• A copper is a good conductor of electricity

• copper is a reddish‑brown colour

• copper is malleable

• copper is shiny

The first part of the word equation for the reaction between copper oxide and sulfuric acid is

copper oxide + sulfuric acid →

Which of the following correctly completes the equation?

• copper + hydrogen

• copper + water

• copper sulfate + hydrogen

• copper sulfate + water