Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).

AcademicChemistryNCERTClass 10

Copper, rather than steel or an alloy of iron, is used to make hot water tanks because copper does not react with either water or steam, while iron reacts with steam to corrode the tank.
  • Copper is unaffected by cold water, hot water, or steam, whereas iron is influenced by steam.
  • Iron would react with steam produced by hot water if water tanks were made of steel, which is an iron alloy.
[Extra information:  Some properties of metals are given below:
  1. The density of metals is usually high.
  2. Metals are malleable and ductile.
  3. Metals form an alloy with other metals or non-metals.
  4. Some metals react with air and corrode. For e.g. Iron.
  5. Metals are good conductors of heat and electricity. Lead is an exception.
  6. Generally, metals are in a solid-state at room temperature. Except for Mercury. Mercury is in a liquid state.]
Updated on 10-Oct-2022 12:46:59