Q61 / 180 · AIIMS 2005 · Chemistry

Assertion : Galvanised iron does not rust. Reason : Zinc has a more negative electrode potential than iron.

  • Correct answer
    A
    If both assertion and reason are true and reason is the correct explanation of assertion
  • B
    If both assertion and reason are true but reason is not the correct explanation of assertion
  • C
    If assertion is true but reason is false
  • D
    If both assertion and reason are false.

Solution

Zinc metal which has a more negative electrode potential than iron will provide electrons in preference to the iron, and therefore corrode first. Only when all the zinc has been oxidised does the iron start to rust.

Hence, the correct answer is option: 'A'.

Relevant Questions