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Food cans are coated with tin and not wi...

Food cans are coated with tin and not with zinc because

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(c) zinc is more reactive than tin
(Being more reactive, zinc may react with acidic foods to form toxic products)
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LAKHMIR SINGH & MANJIT KAUR-METALS AND NON-METALS-Exercise
  1. Define the following terms. (i) Mineral (ii) Ore (iii) Gangue

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  2. Name two metals which are found in nature in the free state.

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  3. What chemical process is used for obtaining a metal from its oxide?

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

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  5. Which metals do not corrode easily?

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  6. What are alloys?

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  7. Which of the following pairs will give displacement reactions?

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

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

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  10. Food cans are coated with tin and not with zinc because

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

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

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

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

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

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

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

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

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

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

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