Home
Class 12
CHEMISTRY
Identify the product and its colour when...

Identify the product and its colour when `MnO_(2)` is fused with solid KOH in the presence of `O_(2)`.

A

`KMnO_(4)`, purple

B

`K_(2)MnO_(4)`, dark green

C

`MnO`, colourless

D

`Mn_(2)O_(3)`, brown

Text Solution

Verified by Experts

The correct Answer is:
B
`2MnO_(2)+4KOH+O_(2) to underset("dark green")(2K_(2)MnO_(4))+2H_(2)O`
Promotional Banner

Topper's Solved these Questions

  • SURFACE CHEMISTRY

    DISHA|Exercise Chemistry|44 Videos

  • THE p-BLOCK ELEMENTS (GROUP 15, 16, 17 AND 1 8)

    DISHA|Exercise MCQ|44 Videos

Similar Questions

Explore conceptually related problems

Identify the product and the colour when MnO_(2) is fused with solid KOH in the presence of oxygen (O_(2))

MnO_(2) is the most important oxide of manganese , MnO_(2) occurs natually as the black coloured mineral pyrolusite. It is an oxidising agent, and decomposes to Mn_(3)O_(4) on heating to 530^(@) C. It is used in the preparation of potassium permanaganate and in the productioon of Cl_(2) gas. Over half million tonnes per year of MnO_(2) is used in dry batteries. Q. When MnO_(2) is fused with KOH in the presence of air, the product formed is:

DISHA-THE d-AND f-BLOCK ELEMENTS-MCQ
  1. In acidic medium KMnO(4) oxidises FeSO(4) solution. Which of the follo...

    Text Solution

    |

  2. In which of the following lanthanides oxidation state +2 is most stabl...

    Text Solution

    |

  3. Acidified solution of chromic acid on treatment with H(2)O(2) gives bl...

    Text Solution

    |

  4. Which of the following is used in the preparation of chlorine?

    Text Solution

    |

  5. An explosion take place when conc. H(2)SO(4) is added to KMnO(4). Whic...

    Text Solution

    |

  6. Which of the following statements are correct? (i) Chromium has the hi...

    Text Solution

    |

  7. In the laboratory, manganese (II) salt is oxidised to permanganate ion...

    Text Solution

    |

  8. Which of the following statements about the interstitial compounds is ...

    Text Solution

    |

  9. Which of the following elements shows maximum number of different oxid...

    Text Solution

    |

  10. Identify the product and its colour when MnO(2) is fused with solid KO...

    Text Solution

    |

  11. In the extraction ofsilverfrom argentite ore. The ore is treated with ...

    Text Solution

    |

  12. Which of the following compound is called Turnbull's blue?

    Text Solution

    |

  13. Which of the following element is responsible for oxidation of water t...

    Text Solution

    |

  14. Consider the following statement (i) La(OH)(3) is the least basic am...

    Text Solution

    |

  15. For making Ag and AgNO(3), which of the following is used

    Text Solution

    |

  16. Which of the following conversions can be carried out by both acidifie...

    Text Solution

    |

  17. The catalytic activity of transition metals and their compounds is mai...

    Text Solution

    |

  18. The basic character of the transition metal monoxides follows the orde...

    Text Solution

    |

  19. Excited state configuration of Mn^(2+) is

    Text Solution

    |

  20. What would happen when a solution of potassium chromate is treated wit...

    Text Solution

    |