Home
Class 12
CHEMISTRY
To an acidified dichromate solution, a p...

To an acidified dichromate solution, a pinch of `Na_(2)O_(2)` is added and shaken. What is observed ?

A

blue colour

B

Orange colour changing to green

C

Copious evolution of oxygen

D

Bluish-green precipitate

Text Solution

Verified by Experts

The correct Answer is:
A, C
`K_(2)Cr_(2)O_(7)+H_(2) SO_(4)+Na_(2)O_(2)tounderset(("blue colour"))(CrO_(5)+K_(2)SO_(4))+Na_(2)SO_(4)+O_(2)`
Promotional Banner

Topper's Solved these Questions

  • D AND F BLOCK ELEMENTS

    BANSAL|Exercise EXERCISE-3 (Miscellaneous Exercise)|10 Videos

  • D AND F BLOCK ELEMENTS

    BANSAL|Exercise EXERCISE-4 (SECTION-A)|7 Videos

  • D AND F BLOCK ELEMENTS

    BANSAL|Exercise Exercise-1 (Single Correct Choice Type)|62 Videos

  • CARBOXYLIC ACID DERIVATIVES

    BANSAL|Exercise Exercise 3|23 Videos

  • GENERAL ORGANIC CHEMISTRY

    BANSAL|Exercise Exercise 3|19 Videos

Similar Questions

Explore conceptually related problems

To an acidified dichromate solution, a pinch of Na_(2)O_(2) is added and shaken. Na_(2)Cr_(2)O_(7) +4Na_(2)O_(2)+5H_(2)SO_(4) to 2(A)+5(B)+5H_(2)O . Compound (A) is blue coloured The sum of the total number of atoms in one molecule of (A) and (B) is

What is O.N of Na in Na_(2)O_(2) ?

The species formed in concentrated aqueous solution of Na_(2)O_(2) is

Acidified K_(2)Cr_(2)O_(7) solution turns green when Na_(2)SO_(3) is added to it. This is due to the formation of

What happen when silver nitrate solution is added to Na_(2)S_(2)O_(3) solution and then content is allowed to keep for a longer period?

BANSAL-D AND F BLOCK ELEMENTS-Exercise-2 (Paragraph Type)
  1. When hydrogen peroxide is added to an acidified solution of a dichrom...

    Text Solution

    |

  2. When hydrogen peroxide is added to an acidified solution of a dichrom...

    Text Solution

    |

  3. (T) imparts violet colour overset(compd(U)+conc.H(2)SO(4))(to)(V)"Red ...

    Text Solution

    |

  4. (T) imparts violet colour overset(compd(U)+conc.H(2)SO(4))(to)(V)"Red ...

    Text Solution

    |

  5. (T) imparts violet colour overset(compd(U)+conc.H(2)SO(4))(to)(V)"Red ...

    Text Solution

    |

  6. Statement-1: The highest oxidation state of chromium in its compound i...

    Text Solution

    |

  7. Assertion : CrO(3) reacts with HCl to form chromyl chloride gas Reas...

    Text Solution

    |

  8. Statement-1: Zinc does nt show characteristic properties of transition...

    Text Solution

    |

  9. Statement-I: Tungsten has a very high melting point. Statement-II: A...

    Text Solution

    |

  10. StatementI: Na(2)O(3) is used in Photography. StatementII: Ag(2)S(2)...

    Text Solution

    |

  11. An element of 3d-transition series shows two oxidation states x and y,...

    Text Solution

    |

  12. To an acidified dichromate solution, a pinch of Na(2)O(2) is added and...

    Text Solution

    |

  13. Amongst CuF(2), CuCl(2) and CuBr(2)

    Text Solution

    |

  14. CuSO(4)(aq)+4NH(3)toX, then X is

    Text Solution

    |

  15. Which of the following statements concern with d-block metals?

    Text Solution

    |

  16. Correct statement(s) is/are:

    Text Solution

    |

  17. In the equation: M+8CN^(-)+2H(2)O+O(2)to4[M(CN)(2)]^(-)+4OH^(-) meta...

    Text Solution

    |

  18. Match the column-

    Text Solution

    |