Question

Rahul takes two test tubes. In tube A he only mixes iron filings with sulfur powder. In tube B he heats the same mixture strongly till a black mass forms. He brings a magnet near both. What will he observe in each tube? What does this show?

Using water as an example, explain how the properties of a compound differ from the properties of the elements that form it.

Hydrogen burns and oxygen supports burning, but water puts out fire. This shows that: