Home
Class 12
CHEMISTRY
Carbon cannot be used in the reduction o...

Carbon cannot be used in the reduction of `A1_(2)O_(3)` because:

A

it is non-metal

B

the heat of formation of `CO_(2)` is more than that of `Al_(2)O_(3)`

C

pure carbon is not easily available

D

the heat of formation of `Al_(2)O_(3)` is too high

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • METALLURGY

    VK JAISWAL|Exercise Level 3 (Passive 1)|5 Videos
  • METALLURGY

    VK JAISWAL|Exercise Level 3 (Passive 2)|5 Videos
  • METALLURGY

    VK JAISWAL|Exercise Level 3 (Passive 7)|8 Videos
  • ENVIRONMENTAL CHEMISTRY

    VK JAISWAL|Exercise ASSERTION-REASON TYPE QUESTIONS|14 Videos
  • p-BLOCK ELEMENTS

    VK JAISWAL|Exercise SUBJECTIVE PROBLEMS|36 Videos
VK JAISWAL-METALLURGY-Level 2
  1. A sulphide ore is first converted into its oxide before reduction. Thi...

    Text Solution

    |

  2. Choose the correct code regarding Roasting process. (I) It is the pr...

    Text Solution

    |

  3. Carbon cannot be used in the reduction of A1(2)O(3) because:

    Text Solution

    |

  4. On heating quicktime with coke in an electric furnace, we get

    Text Solution

    |

  5. Boron can be obtained by various methods but not by :

    Text Solution

    |

  6. Select correct statement :

    Text Solution

    |

  7. The oxide of a metal (R ) can be reduced by the metal (P) and metal (R...

    Text Solution

    |

  8. Consider the following metallurgical processes: (I) Heating impure m...

    Text Solution

    |

  9. When alumina is heated with carbon in the atmosphere of nitrogen then ...

    Text Solution

    |

  10. MgO can be used as a refractory material because

    Text Solution

    |

  11. Amoung the following statements, the incorrect statement is :

    Text Solution

    |

  12. Give the correct order of initials T or F for following statements. Us...

    Text Solution

    |

  13. Find the incorrectly matched pair ?

    Text Solution

    |

  14. Froth floatation process used for the concentration of sulphide ore :

    Text Solution

    |

  15. When ZnS and PbS minearls are present together, then NaCN is added to ...

    Text Solution

    |

  16. Leaching of Ag(2)S is carried out by heating it with a dilute solution...

    Text Solution

    |

  17. Leaching is commercially carried out for in the concentration of :

    Text Solution

    |

  18. NaCN is sometimes added in the froth flotation process as a depressant...

    Text Solution

    |

  19. Which of the following substance acts as collector in froth floatation...

    Text Solution

    |

  20. In which of the following pair of metals, both are commercially extrac...

    Text Solution

    |