Extraction of metals at the bottom of the Activity Series of Low Activity


 
 
Concept Explanation
 

Extraction of metals at the bottom of the Activity Series of Low Activity

Extraction of metals (at the bottom of the Activity Series) of Low Activity:

  • These metals have low reactivity.
  • The oxides of these metals can be reduced to metals by heating alone.
  • Cinnabar is an ore of mercury which on exposure to heat first converts in to mercuric oxide (HgO) and on further heating gets reduced to mercury
  •                    2HgS+3O_2overset{Heat }{rightarrow}:2HgO + 2SO_2

                                     2HgOoverset{Heat }{rightarrow}:2Hg + O_2

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    Sample Questions
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    Question : 1

    _______________________ is an ore of mercury

    Right Option : B
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    Question : 2

    Which of the following are correct :

    (a) Ore of copper (Cu2O) can be reduced by heating to obtain copper.

    (b) Some metals like copper and mercury metals have low reactivity.

    (c) Cinnabar is an ore of mercury.

    Right Option : D
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    Question : 3

    Which of the following are correct :

    (a) Cinnabar is an ore of mercury.

    (b) Cinnabar on exposure to heat first converts in to mercuric oxide (HgO)

    (c) Mercuric oxide on further heating gets reduced to mercury.

    Right Option : D
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