Reactions of Metals Quiz
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5 questions, one answer each
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1. When magnesium reacts with oxygen, what is the formula of the product formed?
- A. MgO
- B. Mg₂O
- C. MgO₂
- D. Mg₃O₂
2. Which of the following statements about the reactivity of metals with water is correct?
- A. Potassium reacts more slowly with water than sodium
- B. Sodium reacts more slowly with water than calcium
- C. Potassium reacts more vigorously with water than sodium
- D. Iron does not react with water at any temperature
3. When zinc reacts with dilute hydrochloric acid, which products are formed?
- A. Zinc chloride and oxygen
- B. Zinc hydroxide and hydrogen
- C. Zinc chloride and hydrogen
- D. Zinc oxide and hydrochloric acid
4. In a displacement reaction, iron displaces copper from copper sulphate solution. Which statement best explains why this occurs?
- A. Copper is a better conductor of electricity than iron
- B. Iron is more reactive than copper and can displace it from its compounds
- C. Copper sulphate is soluble in water but iron sulphate is not
- D. Iron forms stronger bonds with sulphate ions than copper does
5. Write the ionic equation for the reaction between magnesium metal and copper(II) ions in solution. Which of the following is correct?
- A. Mg + Cu²⁺ → Mg²⁺ + Cu
- B. Mg + CuSO₄ → MgSO₄ + Cu
- C. Mg²⁺ + Cu → Mg + Cu²⁺
- D. 2Mg + 2Cu²⁺ → 2Mg²⁺ + 2Cu