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An ice cube is kept on the surface of an aluminium block and another ice cube on the surface of a plastic block. Both blocks have the same temperature. Select the correct statement.

(a) Ice will melt faster on the aluminium block

(b) Ice will melt faster on the plastic block

(c) Ice will melt equally fast on both the blocks

(d) Ice will not melt on the plastic block

The question was posed to me during an online exam.

My question is taken from Temperature and Heat topic in chapter Thermal Properties of Matter of Physics – Class 11

1 Answer

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The correct choice is (a) Ice will melt faster on the aluminium block

Easy explanation: Ice will melt faster on the aluminium block because it has a higher thermal conductivity than plastic and hence conducts heat more rapidly than plastic. Which is why ice melts faster on aluminium.

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