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Give the reason why copper is used to ma...

Give the reason why copper is used to make hot water tanks but steel (an alloy of iron) is not.

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This is because iron present in steel reacts with steam to form ferrosoferric oxide whereas copper has no action with water. As a result of it, the body of the steel tank becomes weaker and weaker in case of iron and not in case of copper.
`3Fe(s)+4H_(2)O(g)overset(Delta)hArrunderset("Ferrosoferric oxide")(Fe_(3)O_(4)(s))+4H_(2)(g)`
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MBD -HARYANA BOARD-METALS AND NON-METALS-SHORT ANSWER TYPE QUESTIONS
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  6. What is a thermite reaction (process) ?

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  7. Differentiate between roasting and calcination.

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