Multiple choice

Which form of iron burns easily in air?

  1. Iron metal

  2. Iron filing

  3. Both (1) & (2)

  4. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Iron filings have a much larger surface area compared to a solid block of iron metal. This increased surface area allows them to react more readily with oxygen in the air, causing them to burn easily.