Home
Class 12
CHEMISTRY
At a site, low grade copper ores are av...

At a site, low grade copper ores are avilable and Zinc and iron scraps are also avilable . Which of the two scraps would be more suitable for reducing the leached copper ore and why?

Text Solution

Verified by Experts

Zinc is present above the iron in electrochemical series. Thus zinc is stronger reducing agent than iron. So the reduction of copper salt with zinc will be faster than with iron. But zinc is costlier metal than iron, so using the scrap iron is advisable and advantageous.
Promotional Banner

Topper's Solved these Questions

  • PRINCIPLES OF METALLURGY

    AAKASH SERIES|Exercise SUBJECTIVE EXERCISE-2 ( SHORT ANSWER QUESTIONS )|8 Videos

  • PRINCIPLES OF METALLURGY

    AAKASH SERIES|Exercise SUBJECTIVE EXERCISE-2 ( VERY SHORT ANSWER QUESTIONS )|19 Videos

  • PRINCIPLES OF METALLURGY

    AAKASH SERIES|Exercise Objective exercise -4 (Assertion (A) & Reason (R) type questions :|39 Videos

  • PRACTICAL CHEMISTRY

    AAKASH SERIES|Exercise PRACTICE SHEET-5 (Integer answer Type questions)|6 Videos

  • PROTEINS AND NUCLEIC ACIDS

    AAKASH SERIES|Exercise PRACTICE SHEET - 4|30 Videos

Similar Questions

Explore conceptually related problems

How is leaching carried out in the case of low grade copper ores?

Two identical coils, one of copper and the other of iron, are rotated with the same angular velocity omega in a uniform magnetic field. In which case the induced e.m.f. is more and why?

Why is the extraction of copper form pyries more difficult then that from its oxide ore through reduction?

i) Bauxite ( Al_2O_3 * 2H_2O ) ii) Copper iron pyrites ( CuFeS_2 ) iii) Gypsum ( CaSO_4 * 2H_2O ) Which of the given ores contains two metals ?

Tin contains only 5 - 10 % of tin as SnO_(2) , the rest being Siliceous matter, wolfram and pyrites of iron copper and arsenic. It is not attached by water. Only molten tin reacts with steam liberating hydrogen. In stannous oxide, tin is +2 oxidising state. So stannous oxide is also described as tin (II) oxide Which of the following ionic species is more stable

Write any two ores with formulae of the following metals: (a) Aluminium (b) Zinc (c) Iron (d) copper

Copper is the most moble of first row transition meals and occurs in small deposits in several countries ares of copper include chalcanthite (CuSO_(4)5H_(2)O) , afecamie (CuCHOH)_(3)) , cuprite (Cu_(2)O) Copper glance (Cu_(2)S) and rolachite (Cu_(2)(OH)_(2)CO_(3)) . However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS_(2)) . The extraction of copper from chalopyrite in polves partial roasting, removal of Iron self-reduction. In sell reduction the reducing species is

AAKASH SERIES-PRINCIPLES OF METALLURGY-PROBLEMS
  1. To precipitate silver from sodium argento-cyanide, aluminium can be us...

    Text Solution

    |

  2. For precipitation of silver from the complex [Ag(CN)(2) ]^(-) , zinc ...

    Text Solution

    |

  3. At a site, low grade copper ores are avilable and Zinc and iron scrap...

    Text Solution

    |

  4. Electrolysis of aqueous alkali metal chloride does not liberate metal....

    Text Solution

    |

  5. How is a mixture of oxides of Aland Fe separated ?

    Text Solution

    |

  6. Graphite rods are frequently replaced in HallHeroult's process of extr...

    Text Solution

    |

  7. In moist air copper corrodes to produce a green layer on the surface....

    Text Solution

    |

  8. Metal sulphides occur mainly in rocks, but metal halides occur in lake...

    Text Solution

    |

  9. Why is the reduction of a metal oxide if the metal formed is in liquid...

    Text Solution

    |

  10. The value of DeltafG^(Theta) for formation of Cr2 O3 is – 540 kJ "mo...

    Text Solution

    |

  11. Reduction of metal sulphides directly with carbon is not possible. Why...

    Text Solution

    |

  12. Eventhough reduction of magnesia with aluminium is thermodynamically f...

    Text Solution

    |

  13. Aluminium containing alumina as impurity can be refined by poling or n...

    Text Solution

    |

  14. The choice of a reducing agent in the extraction of a particular case...

    Text Solution

    |

  15. Hydrogen is a common reductant of organic chemicals, but it is not ...

    Text Solution

    |

  16. Although thermodynamically feasible, in practice alumina is not reduce...

    Text Solution

    |

  17. Reduction of metal oxides by thermit process becomes faster just af...

    Text Solution

    |

  18. Out of coke and carbonmonoxide, which is a better reducing agent for i...

    Text Solution

    |

  19. Both coke and lime stone are used in smelting of iron ore. Why?

    Text Solution

    |

  20. To precipitate silver from sodium argento-cyanide, aluminium can be us...

    Text Solution

    |