Which one of the following alloys contains a non-metal as one of its constituent?

This question was previously asked in
UPSC NDA-II (General Ability) Official Paper-I (Held On: 03 Sept, 2023)
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  1. Brass
  2. Bronze
  3. Amalgam
  4. Steel

Answer (Detailed Solution Below)

Option 4 : Steel
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Detailed Solution

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The correct answer is Steel.

Key Points

  • Steel is an alloy that contains carbon as one of its components.

Additional Information

  • Brass is an alloy made of copper and zinc, which are both metals.
    • There is no non-metal present in brass.
  • Bronze is an alloy of copper and tin, which are both metals.
    • Like brass, bronze contains no nonmetals.
  • Amalgam includes 40–60% silver, 27–30% tin 13–30% copper and 1% zinc set with mercury.
  • Steel is an alloy of iron and carbon, sometimes with other elements added.
    • Carbon is a non-metal, so steel does has a non-metal as one of its components. Hence, the correct answer will be option 4.

Some common mixtures are :

Alloy Mixing Elements
Brass Copper, Zinc
Bronze Copper, Tin
Steel Iron, Carbon
Invar Iron, Nickel
Electrum Gold, Silver
Gun Metal Copper, Tin, Zinc
Fuse Wire Lead, Tin
Alnico Aluminium, Nickel, Cobalt, Iron
Magnalium Aluminium, Magnesium
Steel Iron, Carbon
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