Home
Class 12
CHEMISTRY
Assertion: A1 is obtained by high temper...

Assertion: `A1` is obtained by high temperature reduction of alumina with carbon.
Reason: Alumina reacts with carbon to form `A1_(2)O_(3)` which does not decompose.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
D
Correct Assertion: `A1` is extracted by high temperature electrolytic reduction of `A1_(2)O_(3)` to which fluorspar and cryolite have been added.
Promotional Banner

Topper's Solved these Questions

  • GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF METALS

    A2Z|Exercise AIPMT/NEET Questions|13 Videos

  • GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF METALS

    A2Z|Exercise AIIMS Questions|13 Videos

  • GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF METALS

    A2Z|Exercise Metallurgy Of Cu, Fe, Ag, Al, Zn, And Au|97 Videos

  • ELECTROCHEMISTRY

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • MOCK TEST

    A2Z|Exercise Mock Test 2|45 Videos

Similar Questions

Explore conceptually related problems

Assertion: Aluminothermy is used for extraction of chromium form chromium oxide. Reason: Alumina has a high melting point.

Assertion : Magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium. Reason : MgO curve lies above Al_(2)O_(3) curve in Ellingham diagram.

Assertion (A): Calcium and magnesium oxides are not reduced by carbon. Reason (R ): Calcium and magnesium oxides react with carbon to form their respected carbides.

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

In electrolysis of A1_(2)O_(3) by Hall-Heroult process:

A2Z-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF METALS-Section B - Assertion Reasoning
  1. Assertion: van method is used to prepare ultrapure samples of some met...

    Text Solution

    |

  2. Assertion: Metal ores with are either not reduced by carbon or which f...

    Text Solution

    |

  3. Assertion: Sulphide ores are usually concentrated by froth floatation ...

    Text Solution

    |

  4. Assertion: All minerals are ore. Reason: Ores are minerals from whic...

    Text Solution

    |

  5. Assertion: Nickel is purified by reaction it with CO. Reason: Impur...

    Text Solution

    |

  6. Assertion: Aluminothermy is used for extraction of chromium form chrom...

    Text Solution

    |

  7. Assertion: Ag and Au are extracted by leaching the ores with a dilute ...

    Text Solution

    |

  8. Assertion: Carbonate and hydroxide orea re concentrated by froth float...

    Text Solution

    |

  9. Assertion: A1 is obtained by high temperature reduction of alumina wit...

    Text Solution

    |

  10. Assertion: Durig calcination the ore is heated well below its melting ...

    Text Solution

    |

  11. Assertion: Electropositive metals like Mg,A1 are extracted by electrol...

    Text Solution

    |

  12. Assertion: In Hall-Heroult process aluminium is extracted by the elect...

    Text Solution

    |

  13. Assertion: In extraction of copper from chalcopyrite after roasting in...

    Text Solution

    |

  14. Assertion: Extraction of zinc from sphalerite ore involes the roasting...

    Text Solution

    |

  15. Assertion: Silica is added as a flux in reverberatory furnace, in the ...

    Text Solution

    |

  16. Statement-I : Wolframite impurities are separated from cassiterite by ...

    Text Solution

    |

  17. Assertion: Wrough iron is prepared from cast iron by oxidising impurit...

    Text Solution

    |