S2 Chemistry - Reactivity of Metals

What is produced when a metal reacts with oxygen?

• Salt

• Metal oxide

• Hydrogen

• Water

Which of the following metals reacts the most rapidly with acid?

• Gold

• Iron

• Magnesium

• Copper

What is the result of a reaction between a metal and water?

• Oxygen is produced

• Hydrogen gas is produced

• No reaction occurs

• Heat is released

What type of reaction occurs when metals react with acids?

• Displacement

• Combustion

• Neutralization

• Redox

What is the chemical equation for the reaction of magnesium with hydrochloric acid?

• Mg + HCl → MgCl2 + H2

• Mg + O2 → MgO

• Mg + H2O → Mg(OH)2

• Mg + HCl → MgH2 + Cl2

What is required to balance a chemical equation?

• Equal number of atoms on both sides

• Different coefficients on each side

• The same number of molecules on both sides

• A higher energy release

Which of the following is an example of a combustion reaction?

• Na + Cl2 → NaCl

• 2H2 + O2 → 2H2O

• Zn + HCl → ZnCl2 + H2

• Fe + O2 → Fe2O3

What does a chemical equation represent?

• The physical changes in a reaction

• The products and reactants

• The temperature of a reaction

• The amount of energy produced

Which metal is at the top of the reactivity series?

• Copper

• Iron

• Potassium

• Gold

What happens to the reactivity of metals as you move down the reactivity series?

• It increases

• It decreases

• It stays the same

• It fluctuates