Sea water can be purified by the process of
1). distillation
2). evaporation
3). filtration
4). fractional distillation
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1. The chemical substance present in bones and teeth is
2. Sea weeds are important source of
3. Question 7.2:Why is BiH3 the strongest reducing agent amongst all the hydrides ofGroup 15 elements?
4. Which among the following metals provides amphoteric oxide ?
5. The main constituent of naturalgas is
6. Which one among the following is not a mixture?
7. Removal of carbon particles from air involves the principle of
8. German silver an alloy does not contain the metal
9. Which of the following type of coal has the lowest proportion of volatile matter ?