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State two ways to prevent the rusting of...

State two ways to prevent the rusting of iron.

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(i) By applying a coating of grease or paint on the surface of iron.
(ii) By depositing a layer of zinc on the surface of iron. The process is called galvanisation.
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DINESH PUBLICATION-METALS AND NON-METALS-N.C.E.R.T
  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?

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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

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

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