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Pb and Sn are extracted from their chief ores by:    
  • a)
    carbon reduction and self reduction    
  • b)
    self reduction and carbon reduction    
  • c)
    electrolysis and self reduction        
  • d)
    self reduction and electrolysis
Correct answer is option 'B'. Can you explain this answer?
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Pb and Sn are extracted from their chief ores by: a)carbon reduction a...
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Lead :

Lead has symbol Pb and its atomic mass is 82.

It is heavy in weight.

It is soft and malleable.

Lead ore is usually obtained by mining zinc and copper.

Lead consists of galena.

It is smelted in a blast furnace.

It is then roasted.

Thus it is extracted using self reduction process of extraction.

Tin :

Tin has symbol Sn and its atomic number is 50.

It is white or majorly silver white in colour.

It is extracted by the process of roasting.

Method of pyrometallurgy is used in this extraction process.

Thus it is extracted by the method of carbon reduction.

Hence,

(b) self reduction and carbon reduction respectively is the correct answer.
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Pb and Sn are extracted from their chief ores by: a)carbon reduction a...

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Pb and Sn are extracted from their chief ores by: a)carbon reduction and self reduction b)self reduction and carbon reduction c)electrolysis and self reduction d)self reduction and electrolysisCorrect answer is option 'B'. Can you explain this answer?
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