Home
Class 12
CHEMISTRY
8.34 g of a divalent metal is oxidised b...

8.34 g of a divalent metal is oxidised by 0.680 L of oxygen (in standard conditions). Hence, atomic mass of the metal is

A

`68.7`

B

`34.3`

C

`137.4`

D

`274.7`

Text Solution

Verified by Experts

The correct Answer is:
C
`22.4L` of oxygen at S.T.P. = 32 g
0.680 L of oxygen at S.T.P.
`=(32)/(22.4)xx0.680 = 0.971 g`
0.971 g of oxygen reacts with 8.34 g of metal 8 g oxygen reacts with `(8.34g)/(0.971g)xx8g = 68.71`
`:.` At mass of metal `= "Eq. mass"xx"valency"`
`= 68.71xx2 = 137.42`
Promotional Banner

Topper's Solved these Questions

  • SOME BASIC CONCEPTS OF CHEMISTRY

    DINESH PUBLICATION|Exercise REVISION QUESTIONS FROM COMPETITIVE EXAMS|150 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    DINESH PUBLICATION|Exercise SELECTED STRIGHT OBJECTIVE TYPE MCQs|42 Videos

  • SOLUTIONS

    DINESH PUBLICATION|Exercise ULTIMATE PREPARATORY PACKAGE|10 Videos

  • SURFACE CHEMISTRY

    DINESH PUBLICATION|Exercise BRAIN STORMING MULTIPLE CHOICE QUESTIONS (MCQs)|8 Videos

Similar Questions

Explore conceptually related problems

4 g of a metal oxide contains 1.6 g-oxygen, then equivalent mass of the metal is

A metal oxide has the formula Z_(2)O_(3) . It can be reduced by hydrogen to give free metal and water. 0.1596 g of the metal requires 6 mg of hydrogen for complete reduction. The atomic mass of the metal is:

The same amount of a metal combines with 0.20 g of oxygen and with 3.17 g of a halogen. Hence equivalent mass of halogen is

DINESH PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY-ULTIMATE PREPARATORY PACKAGE
  1. 8.34 g of a divalent metal is oxidised by 0.680 L of oxygen (in standa...

    Text Solution

    |

  2. A flask contains 2.0xx10^(13) molecules of CO(2). To this 1.5xx10^(14)...

    Text Solution

    |

  3. A flask contains 3.0xx10^(16) atoms of He. From This 6.6xx10^(15) atom...

    Text Solution

    |

  4. If one mole of rupees is distributed equally amongst all the poputlati...

    Text Solution

    |

  5. Polyethene can be produced from calcium carbide according to the follo...

    Text Solution

    |

  6. If law of conservation of mass holds good, 2.00 g of Na(2)SO(4) will r...

    Text Solution

    |

  7. If atomic mass of carbon was set at 100 u, what would be the value of ...

    Text Solution

    |

  8. A borane on analysis was found to contain 88.45% boron. Its empirical ...

    Text Solution

    |

  9. A sample of pure compound contains 2.04 g of sodium, 2.65xx10^(22) ato...

    Text Solution

    |

  10. A purified cytochrome protein was found to contain 0.376 % iron. What ...

    Text Solution

    |

  11. A purified pepsin was subjected to amino acid analysis. The amino acid...

    Text Solution

    |

  12. A peroxidase enzyme isolated from red blood cells was found to contain...

    Text Solution

    |

  13. A sample of hydrolysed potato starch is found to contain 0.086% phosph...

    Text Solution

    |

  14. Manganese forms non-stoichiometric oxides having the gereral formula f...

    Text Solution

    |

  15. Before 1961, an atomic mass unit scale was used whose basis was an ass...

    Text Solution

    |

  16. At one time, there was a atomic mass scale on the assignment of the va...

    Text Solution

    |

  17. A flask contains 10^(20) atoms of He (At. Mass =4) at S.T.P. (760 mm H...

    Text Solution

    |

  18. Eq. mass of A(x)B(y) is

    Text Solution

    |

  19. According to Dulong and Petit's rule, in case of solid elements. App...

    Text Solution

    |

  20. Out of atomic mass, mass number and atomic number, the physical quanti...

    Text Solution

    |

  21. Law of constant composition doesnot hold good for

    Text Solution

    |