JAMB 2025 Chemistry · Question 100

Bronze is used in making

Options

  1. A.musical instruments and ornaments
  2. B.coins and medals
  3. C.electromagnets and cutlery
  4. D.aircrafts and ship

Answer: B. coins and medals

Explanation written with AI and checked against the answer key

Step 1: Analyze the question The question asks about the uses of bronze, which is an alloy. The key is to recall its composition and its properties.

Step 2: Explain the concept Bronze is an alloy of copper and tin (about 88% copper and 12% tin). Its properties include:

  • Hard and strong
  • Resistant to corrosion
  • Easy to cast into shapes
  • Produces a ringing sound when struck

Because of these properties, bronze is used for coins, medals, statues, bells, and ship propellers.

Step 3: Evaluate each option

  • A. Musical instruments and ornaments: This is partly true, since bronze is used for bells and cymbals. However, brass (copper and zinc) is the alloy more commonly linked with musical instruments such as trumpets. In JAMB questions, brass is the standard answer for musical instruments.
  • B. Coins and medals: This is correct. Bronze is the classic alloy for coins and medals (think of the Olympic bronze medal and old Nigerian copper-bronze coins).
  • C. Electromagnets and cutlery: Electromagnets use soft iron, and cutlery uses stainless steel. Bronze is not used for either.
  • D. Aircraft and ships: Aircraft use duralumin, an aluminium alloy. Bronze is not used for aircraft, so this option is wrong.

Step 4: Answer The correct answer is B. coins and medals.

Tip: Memorize the common alloys and their uses:

  • Bronze (Cu + Sn): coins, medals, statues
  • Brass (Cu + Zn): musical instruments, ornaments, door fittings
  • Duralumin (Al + Cu + Mg): aircraft
  • Stainless steel (Fe + Cr + Ni): cutlery

Remember "Bronze = Bells, Badges (medals)", while brass is for instruments.

AI can make mistakes. Report anything that looks wrong.

Past questions © the examination body (JAMB/WAEC/NECO). DeeepSolve is not affiliated with them. Rights holders: see /copyright.