Question

a molten metal that catches fire in chlorine gas and gives off white fumes

Answer 1

Answer:

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Answer 2

Answer:

The molten metal that catches fire in chlorine gas and gives off white fumes is sodium. The metal that forms two types of its oxide and rust in moisture is iron. The formulas of its oxides are : FeO;Fe2O3. The metal used in hot water systems is copper, because it is a good conductor of heat and electricity.