Home
Class 12
CHEMISTRY
20.0 g of a magnesium carbonate sample d...

20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What be the percentage purity of magnsesium carbonate in the sample?

A

75

B

96

C

60

D

84

Text Solution

Verified by Experts

The correct Answer is:
D
`{:(MgCO_(3),rarr,MgO+CO_(2)),(84 g,,40 g):}`
`:. 8g MgO` will be from `84/5 g`
`:.` % purity `=84/5xx100/20=84 %`
Promotional Banner

Topper's Solved these Questions

  • SOME BASIC CONCEPTS OF CHEMISTRY

    ERRORLESS |Exercise Ordinary Thinking (Objective Questions) Oxidation, Reduction, Oxidizing and Reducing agent|54 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    ERRORLESS |Exercise Ordinary Thinking (Objective Questions) Oxidation number and Oxidation state|83 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    ERRORLESS |Exercise Ordinary Thinking (Objective Questions) The mole concept|43 Videos

  • SOLUTION

    ERRORLESS |Exercise JEE SECTION (JEE (Advanced)2018) (Numeric answer type questions)|3 Videos

  • THERMODYNAMICS AND THERMOCHEMISTRY

    ERRORLESS |Exercise JEE section (JEE (Advanced) 2018) Numeric answer type questions|2 Videos

Similar Questions

Explore conceptually related problems

20.0 g of magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g of magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample?

Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?

2.5 g of an impure sample of sodium bicarbonate when heated strongly gave 300 ml of carbon dioxide measured at 27^(@) C and 760 mm pressure. Calculate the percentage purity of the sample

Calculate the mass of carbon present in 2 g of carbon dioxide.

ERRORLESS -SOME BASIC CONCEPTS OF CHEMISTRY-Ordinary Thinking (Objective Questions) Chemical stochiometry
  1. 10 g of hydrogen and 64 g of oxygen were filled in a steel vessel and...

    Text Solution

    |

  2. 1.0 g of magnesium is burnt with 0.56 g O(2) in a closed vessel. Which...

    Text Solution

    |

  3. 20.0 g of a magnesium carbonate sample decomposes on heating to give c...

    Text Solution

    |

  4. What is the mass of the precipitate formed when 50 mL of 16.9% solutio...

    Text Solution

    |

  5. Suppose the elements X and Y combine to form two compounds of XY(2) an...

    Text Solution

    |

  6. The equivalent weight of phosphoric acid (H(3)PO(4)) in the reaction N...

    Text Solution

    |

  7. During electrolysis of water, the volume of oxygen liberate is 2.24 dm...

    Text Solution

    |

  8. A solution of 10 ml M/10 FeSO(4) war titrated with KMnO(4) solution in...

    Text Solution

    |

  9. Equivalent weight of KMnO(4) acting as an oxidant in acidic medium is

    Text Solution

    |

  10. The percentage of P(2)O(5) in diammonium hydrogen phosphate is:

    Text Solution

    |

  11. KMnO(4) reacts with ferrous ammonium sulphate according to the equatio...

    Text Solution

    |

  12. What is the stoichiometric coefficient fo Ca in the reaction ? Ca+Al...

    Text Solution

    |

  13. When 2.76 g of silver carbonate is strongly heated, it yields a residu...

    Text Solution

    |

  14. In the complex with formula MCl(3).4H(2)O the co-ordination number of ...

    Text Solution

    |

  15. How many mL of perhydrol is requried to produce sufficient oxygen whic...

    Text Solution

    |

  16. One mole of potassium dichromate completely oxidises the following num...

    Text Solution

    |

  17. 1 g of a mixture of NaHCO(3) and Na(2)CO(3) is heated to 150^(@)C. The...

    Text Solution

    |

  18. In order to prepare one litre normal solution of KMnO(4), how many gra...

    Text Solution

    |

  19. The oxygen obtained form 72 kg of water is

    Text Solution

    |

  20. What volume of oxygen gas (O(2)) measured at 0^(@)C and 1 atm is neede...

    Text Solution

    |