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Chemistry CBSE Live product
Class 7 (2025-26)
The World of Metals and Non-metals
Effect of water on materials
8.
Rusting
Question:
4
m.
Observe the given image and choose the
correct
answer for the following questions:
Formation of rust
1.
What are the two main conditions required for rusting to occur?
Both air and moisture
Only water
Air and heat
Only air
2.
Why rusting occurs in the test tube 'A'?
Both air and water are present
Only air is present
Only water is present
Water present is cold
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