define the following as per 9th class icse text book:
1. distillation
2. water pollution
3. solution
4. efflorescence
5. hygroscopic substances
6. solubility
7. burning
8.saturated solution
9.neutralisation reaction
10.pollution
11.thermal dissociation
12.hydrolysis
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2012-10-02T11:49:55-0400
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