Iron and D. Sodium Question

Section A  Multiple choice (17 marks)
Do NOT Write on this section of the paper.
Answer ALL questions in the table provided at the start of Section B
Question 1.
Which of the following best describes the structure of metals? A lattice of
A. alternating positive and negative ions
B. positive ions surrounded by freely moving electrons
C. molecules held together by covalent bonds
D. atoms held together by covalent bonds
Question 2.
Which of the following is not a property of most metals?
A. Malleable B. Good electrical conductors
C. Poor thermal conductors D. Shiny appearance
Question 3.
An alloy of iron and carbon which contains 4% carbon is likely to be
A. weaker and more malleable than pure iron
B. weaker and more brittle than pure iron
C. stronger and more malleable than pure iron
D. stronger and more brittle than pure iron
Question 4.
Which of the following alloys does not contain tin (Sn)?
A. Brass B. Bronze C. Solder D. Dental amalgam
Question 5.
What is the percentage of pure gold in a 12-carat gold bracelet?
A. 25% B. 50% C. 75% D. 100%
Question 6.
Which of the following metals is not naturally found as a pure element?
A. Platinum B. Silver C. Gold D. Sodium
Question 7.
During the process of froth flotation, waste material is separated from the ore. This waste material is called
A. the overburden B slag C gangue D a mineral
Question 8.
Moving through the activity series for metals from potassium (K) to copper (Cu), the metals become more
A likely to be found as native metals B reactive
C expensive to extract from their ores D likely to donate electrons

Question 9.
Which of the following equations represents the process occurring at the positive electrode during the extraction of magnesium by electrolysis of molten magnesium chloride?
A Mg2+ + 2e–  Mg B Mg  Mg2+ + 2e–
C 2Cl–  Cl2 + 2e– D Cl2 + 2e–  2Cl–
Question 10.
Which of the following metals would usually be extracted from