Home
Class 12
CHEMISTRY
The mass of carbon anode consumed (givin...

The mass of carbon anode consumed (giving only carbon dioxide) in the production of 270 kg of aluminium metal from bauxite by Hall process is:

A

180 kg

B

270 kg

C

540 kg

D

90 kg

Text Solution

Verified by Experts

The correct Answer is:
D
`2Al_2O_3 + 3C to 3CO_2 + 4Al`
`4 xx 27` g of Al are obtained when carbon anode consumed = `12 xx 3 g`
270 g of the Al are obtained when carbon anode consumed ` = (12 xx 3)/(4 xx 27) xx 270 = 90 kg `
Promotional Banner

Topper's Solved these Questions

  • SOME BASIC CONCEPTS OF CHEMISTRY

    MODERN PUBLICATION|Exercise MULTIPLE CHOICE QUESTION (LEVEL-III)|5 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    MODERN PUBLICATION|Exercise RECENT EXAMINATION QUESTION|15 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    MODERN PUBLICATION|Exercise RECENT EXAMINATION QUESTION|15 Videos

  • SOLUTIONS

    MODERN PUBLICATION|Exercise Recent Examination Questions|13 Videos

  • STATES OF MATTER

    MODERN PUBLICATION|Exercise RECENT EXAMINATION QUESTIONS|12 Videos

Similar Questions

Explore conceptually related problems

Why should the metal sulphides and carbonated ores be converted to metal oxides in the process of extraction of the metal from them?

Carbon dioxide is transproted from tissues to respirtatory surface by only

Carbon dioxide is added to 112g of calcium oxide. The product formed is 200g of calcium carbonate. Calculate the mass of carbon dioxide used. Which law of chemical combination will govern your answer. (AS-1)

Give Reason: a. Prior to reduction of the metal, sulphides and metal carbonates must be converted into metal oxides. b. for extracting some metals, displacement reactions are used instead of carbon to obtain metals from their oxides.

Give reasons a. Platinum, gold and silver are used to make jewellery. b. Carbonate and sulphide ores are usually converted into oxides during the process of extraction. c. School bells are made up of metals.

A 100% pure sample of a divalent metal carbonate weighing 2 g on complete thermal decomposition releases 448 cc of carbon dioxide at STP. The equivalent mass of the metal is

0.22 g of a hydrogen (i.e., a compound conatining carbon and hydrogen only) on complete combustion with oxygen gave 0.9 g water and 0.44 g carbon dioxide. Show that these results are in accordance with the law of conservation of mass (atomic mass of C = 12, H = 1, O = 16) .

(i) "Sodium is a highly reactive metal and it cannot be obtained from its oxide by heating with carbon". Give reason. (ii) How can sodium be obtained from sodium chloride ?

MODERN PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY -MULTIPLE CHOICE QUESTION (LEVEL-II)
  1. One mole of calcium phosphide on reaction with excess of water gives

    Text Solution

    |

  2. A gaseous mixture contain 50% He and 50% CH4 by volume. What is the ...

    Text Solution

    |

  3. The mass of carbon anode consumed (giving only carbon dioxide) in the ...

    Text Solution

    |

  4. If 30 ml of H2 and 20 ml of O2 react to form water, what is left ...

    Text Solution

    |

  5. An alkaloid contains 17-28% of nitrogen and its molecular mass is 162...

    Text Solution

    |

  6. For the formation of 3.65 g of hydrogen chloride gas, what volumes of ...

    Text Solution

    |

  7. How many moles of lead (II) chloride will be formed from a reaction b...

    Text Solution

    |

  8. Volume occupied by one molecule of water (density = 1 g cm^-3 ) is :

    Text Solution

    |

  9. What volume of oxygen gas (O2) measured at 0^@C and 1 atm is needed ...

    Text Solution

    |

  10. If 1.5 moles of oxygen combine with Al to form Al2O3 , the mass of Al ...

    Text Solution

    |

  11. For a reaction A + 2B to C , the amount of C formed by starting the ...

    Text Solution

    |

  12. A sample of phosphorus trichloride (PCl3) contains 1.4 moles of the...

    Text Solution

    |

  13. 4 g of copper was dissolved in concentrated nitric acid. The copper ni...

    Text Solution

    |

  14. The crystalline salt Na2 SO4.xH2O on heating loses 55.9 % of its weig...

    Text Solution

    |

  15. What is the molality of pure water

    Text Solution

    |

  16. The molarity of 98% H2SO4 (d = 1.8 g/mL) by weight is

    Text Solution

    |

  17. How much time (in hours ) would it take to distribute one avogardo num...

    Text Solution

    |

  18. Arrange the following in the order of increasing mass (atomic mass: O ...

    Text Solution

    |

  19. Which one of the following sets of compounds correctly illustrate the...

    Text Solution

    |

  20. 20.0 kg of N2(g) and 3.0 kg of H2(g) are mixed to produce NH3(g) . The...

    Text Solution

    |