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Chemistry CBSE Live product
Class 7
The World of Metals and Non-metals
Effect of water on materials
7.
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 and water are immiscible
Oil keeps the air away from iron nail
Oil dissolves the rust
2.
Which of the following shows the correct conditions for rusting?
Iron+air+water
Iron+water
Iron+oil
Iron+dry air
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