Question 7 — What new substance is - Questions at the end of the chapter - Chapter 8 Class 8 - Nature of Matter: Elements, Compounds (Curiosity)

Last updated at June 17, 2026 by

Q 7
Question

What new substance is formed when a mixture of iron filings and sulfur powder is heated, and how is it different from the original mixture? Also, write the word equation for the reaction.

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Answer
Iron sulfide is formed — a compound, unlike the mixture.

Explanation

Iron + sulfur mixture Iron sulfide (compound)
Iron and sulfur seen separately. Uniform black mass throughout.
Iron is attracted to a magnet. Not attracted to a magnet.
Components can be separated. Cannot be separated by physical means.
  • Word equation: Iron + Sulfur → Iron sulfide.
  • The product has new properties and is a compound.
Heating forms iron sulfide, a compound that is non-magnetic and cannot be separated, unlike the mixture.
← Back to concept: 8.3.2 Compounds
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