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Copper and silver lie below hydrogen in ...

Copper and silver lie below hydrogen in electrochemical series and yet they are found in the combined state as sulphides in nature. Comment.

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**Step-by-Step Text Solution:** 1. **Understanding the Electrochemical Series**: - Copper (Cu) and silver (Ag) are positioned below hydrogen (H) in the electrochemical series. This indicates that they are less reactive and less electropositive compared to hydrogen. 2. **Combined State in Nature**: - Despite being less reactive, copper and silver are commonly found in nature in the form of sulfides (Cu₂S for copper and Ag₂S for silver). This raises the question of why they exist in a combined state if they are less reactive. ...
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CENGAGE CHEMISTRY ENGLISH-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS-Exs 1.1 (Subjective)
  1. Why is Fe an abundant element on earth, and why are the elements with ...

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  2. Copper and silver lie below hydrogen in electrochemical series and yet...

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  3. Describe the principle of froth flotation process. What is the role of...

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  4. Which methods would you recommed for the purification of impure metals...

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  5. Name the chief forms of the occurrence of the following in the earth's...

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  6. Discuss some of the factors which need consideration before deciding o...

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  7. The choice of a reducing agent in a particular case depends on thermod...

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  8. Which is a better reducing agent at 710^@ C : C or CO ?

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  9. Indicate the temperature at which carbon can be used as a reducing age...

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  10. Is it true that under certain conditions, Mg can reduce SiO(2), and S...

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  11. Giving appropriate examples (at least three), explain how the reactivi...

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  12. Alkali metals cannot be extracted by reduction of their oxides and oth...

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  13. Outline the principles of refining of metals by the following methods:...

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  14. Predict the modes of occurrence of the following three types of metals...

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  15. How do non-metals occur in nature ? How are they extracted//isolated f...

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  16. Name the chief ores of tin, iron and aluminium. What methods are emplo...

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  17. Name three ores which are concentrated by froth flotation process. Wha...

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  18. What is the thermodynamic consideration in the choice of a reducing ag...

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  19. Carbon monoxide is more effective reducing agent than carbon below 983...

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  20. Describe the principle of extraction of each of the following : (a) ...

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