NECO 2003 Chemistry · Question 37
Which metal is a constituent of both bronze and solder?
Options
- A.copper
- B.lead
- C.silver
- D.tin
- E.zinc
Answer: D. tin
Explanation written with AI and checked against the answer key
Step 1: Analyze the question We need a metal found in both bronze and solder, so we look at the composition of each alloy.
Step 2: Recall the compositions
- Bronze = copper + tin (the main components)
- Solder = tin + lead (the classic soft solder)
- Brass = copper + zinc (a common distractor)
Step 3: Find the common metal
- Bronze: copper, tin
- Solder: tin, lead
The metal in both is tin.
Step 4: Check the other options
- A. Copper: in bronze but not in ordinary solder.
- B. Lead: in solder but not in bronze (in the standard definition).
- C. Silver: not a standard component of either.
- E. Zinc: in brass, not in bronze or solder.
The correct answer is **D.
Exam tip: Remember the alloys with this pairing:
- Bronze = Cu + Sn
- Brass = Cu + Zn
- Solder = Sn + Pb
Tin appears in both bronze and solder.
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