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  9. Q37

CGPSC 2016 · Question 37 of 100

Example of corrosion is

Science & Tech

  1. ABlack coating on Silver
  2. BGreen coating on Copper
  3. CBrown coating on Iron
  4. DAbove threeCorrect
  5. ENone of the above

Answer: D. Above three

Explanation

Corrosion is a natural process that converts a refined metal into a more stable form, such as its oxide, hydroxide, or sulfide. It is a gradual destruction of materials (usually metals) by chemical and/or electrochemical reaction with their environment.

Source: CGPSC 2016 official paper

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