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NDA 1 2025 GAT, question 143

Topic: Chemistry

Q143

Which one among the following elements is known to be discovered the earliest ?

  1. (a) CopperCorrect answer
  2. (b) Gold
  3. (c) Oxygen
  4. (d) Uranium

Solution.

Answer: (a) Copper

  1. Copper has the earliest known human use among these: copper objects more than ten thousand years old have been found.
  2. Oxygen and uranium were identified only in the eighteenth century.

Trap: Gold was also known in ancient times, but copper has the older recorded use, so it is taken as the earliest.