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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
best
answer for the following questions:
Formation of rust
1.
Why rusting does not occur in the test tube 'B'?
Water is hot, were rusting will not occur
Oil dissolves the rust
Oil keeps the air away from iron nail
Oil and water are immiscible
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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