Find the odd one out and give the reason:

1 Table, chalk, book, water. 

2 Paper, oil, sand, cardboard 

3 Iodine, camphor, chalk, naphthalene 

4 Petrol ,diesel ,kerosene, brass 

5 Air, carbon dioxide, oxygen, mercury 

6 Camphor, iodine, brass, naphthalene 

7 Ice, stone, kerosene, sugar. 

8 Carbon dioxide, oxygen, mercury, hydrogen 

9 Boling, evaporation, condensation, vaporization 

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