Water contained in a jar at room temperature (20oC) is intended to be colled by method - I or method

Question

Water contained in a jar at room temperature (20^oC) is intended to be colled by method - I or method - II given below :
Method - I : By placing ice cubes and allowing it to float.
Method - II : By wrapping ice cube in a wire mesh and allowing it to sink.
Choose best method (s) to cool the water.

Accepted Answer

Initially (above 4oC), a decrease in temperature, increase the density of water and consequently it descends, replacing the relative the relatively warm water. Convention currents set up in the way this way demands the location of ice to be on the water surface.Below 4oC, ma decrease in temperature the water density and as a result ascends up displacing the relatively warn water. To setup convention currents in this way the position of ice cubes should be at the bottom.

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