Answers

2014-09-21T19:32:04+05:30
Alluminium foil and copper foil float on water because their density is less than the water
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i asked metals .. not their other forms... Be alert , what you read.
2014-09-21T19:39:04+05:30
Sodium and potassium will flow on water as they react with water to give hydrogen gas.
2Na+2H²O=2NaOH+H²
2K+2H²O=2KOH+H²
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