Pure water can be obtained from sea water by:
1. Centrifugation
2. Plasmolysis
3. Reverse osmosis
4. Sedimentation
on oxidation gives:
1.
2.
3.
4.
The pair that on reaction will not evolve gas is
1. Copper and HCl (aqueous)
2. Iron and steam
3. Iron and (aqueous)
4. Sodium and ethyl alcohol