| Observe the given experimental set-up carefully. |
|
| In which test tubes rusting of iron nails will not take place? |
A) P and Q only
B) Q and R only
C) P and R only
D) All of these
Correct Answer: A
Solution :
In test tube P, iron nails do not rust because boiled water does not contain any oxygen. A thin layer of oil also prevents oxygen from reaching the water in the test tube. In test tube 0, iron nails do not rust because soda lime absorbs water vapours. In test tube R, iron nails will rust because water and oxygen both are available.
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