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Give reasons why copper is used to make ...

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

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Copper does not react with cold water, hot water, or steam. However, iron reacts with steam. If the hot water tanks are made of steel (an alloy of iron), then iron would react vigorously with the steam formed from hot water.
`underset("Inron")ubrace(3Fe)+underset("steam")ubrace(4H_(2)O)to underset("Iron oxide")ubrace(Fe_(3)O_(4))+underset("Hydrogen")ubrace(4H_(2)`
That is why copper is used to make hot water tanks, and not steel.
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NCERT-METALS AND NON-METALS-Exercise
  1. What chemical process is used for obtaining a metal from its oxide?

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  2. Metallic oxides of zinc, magnesium and copper were heated with the fol...

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  3. Which metals do not corrode easily?

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  4. What are alloys?

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  5. Which of the following pairs will give displacement reactions? (i) Na...

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  6. Which of the following methods is suitable for preventing an iron fryi...

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  7. An element reacts with oxygen to give a compound with a high melting p...

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  8. Food cans are coated with tin and not with zinc because (a) zinc is ...

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  9. You are given a hammer, a battery, a bulb, wires and a switch. (a) H...

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  10. What are amphoteric oxides? Give two examples of amphoteric oxides.

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  11. Name two metals which will displace hydrogen from dilute acids, and tw...

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  12. In the electrolytic refining of a metal M, what would you take as the ...

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  13. Pratyush took sulphur powder on a spatula and heated it. He collected ...

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  14. State two ways to prevent the rusting of iron.

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  15. What type of oxides is formed when non-metals combine with oxygen?

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  16. Give reasons (a) Platinum, gold and silver are used to make jeweller...

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  17. You must have seen tarnished copper vessels being cleaned with lemon o...

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  18. Differentiate between metal and non-metal on the basis of their chemic...

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  19. A man went door to door posing as a goldsmith. He promised to bring ba...

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  20. Give reasons why copper is used to make hot water tanks and not steel ...

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