149 classify the following properties as either chemical or physical a
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1.49 Classify the following properties as either chemical or physical: (a) an electric current sent through water results in the production of bubbles of hydrogen gas; (b) lead melts at
327°C; (c) lead is a metal, has a silvery luster, and conducts electricity; (d) when lead is heated in oxygen, its appearance changes from a silvery luster to a white solid that no longer conducts electricity.