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Metals X and Y can be recovered from the...

Metals X and Y can be recovered from the anode mud left behind after the electrolytic refining of copper metal. The coins made of metal X look new even after several years of use but the coins made of metal Y lose their shine gradually and get blackened soon. when metal X is alloyed with a small amount of metal Y, it becomes hard and hence suitable for making ornaments. what are metals X and Y? Also state the colour of metal X.

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Metal X is gold and metal Y is silver, the colour of metal X (gold) is yellow:
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LAKHMIR SINGH & MANJIT KAUR-METALS AND NON-METALS-Exercise
  1. Four metals P, Q, R and S are all obtained by the reduction of their o...

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  2. A black metal oxide XO(2) is used as catalyst in the preparation of ox...

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  3. Metals X and Y can be recovered from the anode mud left behind after t...

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  4. Give an example of a metal which (i) is a liquid at room temperatur...

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  5. Explain the meanings of malleable and ductile.

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  6. Why is sodium kept immersed in kerosene oil?

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  7. Write equations for the reactions of (i) iron with steam (ii) calc...

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  8. Samples of four metals A, B, C and D were taken and added to the follo...

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  9. Which gas is produced when dilute hydrochloric acid is added to a reac...

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  10. What would you observe when zinc is added to a solution of iron (II) s...

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  11. (i) Write the electron-dot structures for sodium, oxygen and magnesium...

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  12. Why do ionic compounds have high melting points?

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  13. Define the following terms. (i) Mineral (ii) Ore (iii) Gangue

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

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

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

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  17. Which metals do not corrode easily?

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  18. What are alloys?

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

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

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