Home
Class 12
CHEMISTRY
Why is KMnO4 kept in dark bottles ?...

Why is `KMnO_4` kept in dark bottles ?

Text Solution

Verified by Experts

The correct Answer is:
`Mno_(4)^(-)` solution are intrinsically unstable in acidic solution and decompose slowly. This decomposition is catalysed by sun light. This is the statement -2 for which `KMnO_(4)` solution is kept in dark bottles.
`4MnO_(4)^(-)+4H^(+)undersetto (Hv) 4MnO_(2)+3O_(2)+2H_(2)O`
Promotional Banner

Topper's Solved these Questions

  • D BLOCK ELEMENTS

    RESONANCE ENGLISH|Exercise EXERCISE-I PART-II|56 Videos

  • D BLOCK ELEMENTS

    RESONANCE ENGLISH|Exercise EXERCISE-I PART-III|15 Videos

  • D BLOCK ELEMENTS

    RESONANCE ENGLISH|Exercise BOARD LEVEL EXERCISE|21 Videos

  • D & F BLOCK ELEMENTS

    RESONANCE ENGLISH|Exercise ORGANIC CHEMISTRY(Aldehydes , Ketones, Carboxylic acid)|15 Videos

  • DPP

    RESONANCE ENGLISH|Exercise QUESTIONS|368 Videos

Similar Questions

Explore conceptually related problems

Why is (a) concentrated sulphuric acid kept in air tight bottles ?

Give reason for the following: (i). Silver ornament gets tarnished when exposed to atmosphere for a long time. (ii) Silver nitrate solution is kept in dark coloured bottles. (iii). Why does AgNO_3 produce a black stain on the skin.

Silver nitrate solution is kept in brown bottles in laboratory because:

State what is observed when nitric acid is kept in a reagent bottle for a long time .

Nitric acid may be kept in a bottle of :

Silver nitrate is usually kept in coloured bottles because it is:

Why is an egg kicked out of a bottle when air is blown inside the bottle?

Explain why : If distilled water is kept in a sealed bottle for a long time, it leaves etchings on the surface of the glass.

Chloroform is stored in dark coloured bottles. Explain in not more than two sentences.

PCl_5 is kept in well stoppered bottles because

RESONANCE ENGLISH-D BLOCK ELEMENTS-EXERCISE-I PART-I
  1. Explain giving reasons: (i) Transition metals and many of their compou...

    Text Solution

    |

  2. Explain why transition metals and their many compounds act as good cat...

    Text Solution

    |

  3. A transition element forms alloys with other transition metals easily....

    Text Solution

    |

  4. Describe The general characteristics of transition elements with speci...

    Text Solution

    |

  5. What happen when CuSO(4) solution is treated with (excess of ammonia...

    Text Solution

    |

  6. What happens when silver nitrate solution is added to Na(2)S(2)O(3) so...

    Text Solution

    |

  7. What reaction will take place if a silver coin is put in dilute HNO(3)...

    Text Solution

    |

  8. Which type of reaction MnO(4)^(2-)show with acid , dilute -alkali or w...

    Text Solution

    |

  9. Why is KMnO4 kept in dark bottles ?

    Text Solution

    |

  10. Why does AgNO(3) produced a black stain on the skin?

    Text Solution

    |

  11. Why is AgBr used in photography ?

    Text Solution

    |

  12. Why it is not advisable to dissolve KMnO(4) in cold and concentrated H...

    Text Solution

    |

  13. What happen when: (a) Green Vitriol is strongly heated. , (b) FeSO(4)...

    Text Solution

    |

  14. Complete and balance the following reactions: (a) FeSO(4)+H(2)O+O(2)...

    Text Solution

    |

  15. CrO(O(2))(2) is stable in pyridine. Explain?

    Text Solution

    |

  16. Write the formula of the compound formed by K(2)Cr(2)O(7) in alkaline ...

    Text Solution

    |

  17. What are inner transition elements? Decide which of the following atom...

    Text Solution

    |

  18. The chemistry of the actinoid elements is not so smooth as that of the...

    Text Solution

    |

  19. The chemistry of the actinoid elements is not so smooth as that of the...

    Text Solution

    |

  20. Why Sm^(2+) , Eu^(2+) and Yb^(2+) ions are good reducing agents , but ...

    Text Solution

    |