Home
Class 12
CHEMISTRY
Structure of Cr(2)O(7)^(2-) has...

Structure of `Cr_(2)O_(7)^(2-)` has

A

Two tetrahedra sharing one corner

B

Two tetrahedra sharing one edge

C

Two tetrahedra sharing one face

D

Irregular octahedral

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • D-BLOCK ELEMENTS

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE-1 (LANTHANIDES AND ACTINIDES)|26 Videos

  • D-BLOCK ELEMENTS

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE-2 (GENERAL PROPERTIES AND ELECTRONIC CONFIGURATION)|21 Videos

  • D-BLOCK ELEMENTS

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE-1 (INTERSTITIAL COMPOUNDS)|5 Videos

  • D - BLOCK ELEMENTS

    AAKASH SERIES|Exercise PRACTICE EXERCISE|50 Videos

  • DILUTE SOLUTIONS

    AAKASH SERIES|Exercise EXERCISE - 1.2|55 Videos

Similar Questions

Explore conceptually related problems

K_2Cr_2O_7 acts as a good oxidizing agent in acidic medium underset("Orange")(Cr_(2)O_(7)^(2-)) + 14H^(+) + 6e^(-) rarr underset("Green")(2Cr^(3+)) + 7H_2O In alkaline solution, orange colour of Cr_(2)O_(7)^(2-) chages to yellow colour due to formation of Cr_2O_(4)^(2-) and again yellow colour changes to orange colour on changing the solution to acidic medium underset("Orange")(Cr_2O_7^(2-))+2OH^(_) rarrunderset("Yellow")(Cr_2O_7^(2-))+H_2O underset("Yellow")(2CrO_(4)^(2_-)) + 2H^(+) rarr underset("Orange")(Cr_(2)O_(7)^(2-) + H_(2)O) Cr_(4)^(2-) and Cr_(2)O_(7)^(2-) exist in equilibrium at pH =4 and are interconvertible by altering the pH of the solution. When heated with H_2SO_4 and metal chloride K_2Cr_2O_7 gives vapour of chromyl chloride (CrO_2Cl_2) . Chromyl chloride (CrO_2Cl_2) when passed into aqueous NaOH solution, yellow colour solution of CrO_(4)^(2-) is obtained. This on reaction with lead acetate gives yellow ppt. PbCrO_4 . When H_2O_2 is added to an acidified solution of dichromate ion, a complicated reaction occurs. The products obtained depend on the pH and concentration of dichromate. Cr_2O_7^(2-)+2H^(+) + 4H_(2)O_(2) rarr 2Cr(O_2)+5H_2O A deep blue-violet coloured peroxo compound, CrO(O_2)_2, ' called chromic peroxide is formed. This decomposes rapidly in aqueous solution into Cr^(3+) and xygen. Which of the following statements is wrong when a mixture of NaCI and K_2Cr_2O_2 is gently walmed with conc. H_2SO_4 ?

K_2Cr_2O_7 acts as a good oxidizing agent in acidic medium underset("Orange")(Cr_(2)O_(7)^(2-)) + 14H^(+) + 6e^(-) rarr underset("Green")(2Cr^(3+)) + 7H_2O In alkaline solution, orange colour of Cr_(2)O_(7)^(2-) chages to yellow colour due to formation of Cr_2O_(4)^(2-) and again yellow colour changes to orange colour on changing the solution to acidic medium underset("Orange")(Cr_2O_7^(2-))+2OH^(_) rarrunderset("Yellow")(Cr_2O_7^(2-))+H_2O underset("Yellow")(2CrO_(4)^(2_-)) + 2H^(+) rarr underset("Orange")(Cr_(2)O_(7)^(2-) + H_(2)O) Cr_(4)^(2-) and Cr_(2)O_(7)^(2-) exist in equilibrium at pH =4 and are interconvertible by altering the pH of the solution. When heated with H_2SO_4 and metal chloride K_2Cr_2O_7 gives vapour of chromyl chloride (CrO_2Cl_2) . Chromyl chloride (CrO_2Cl_2) when passed into aqueous NaOH solution, yellow colour solution of CrO_(4)^(2-) is obtained. This on reaction with lead acetate gives yellow ppt. PbCrO_4 . When H_2O_2 is added to an acidified solution of dichromate ion, a complicated reaction occurs. The products obtained depend on the pH and concentration of dichromate. Cr_2O_7^(2-)+2H^(+) + 4H_(2)O_(2) rarr 2Cr(O_2)+5H_2O A deep blue-violet coloured peroxo compound, CrO(O_2)_2, ' called chromic peroxide is formed. This decomposes rapidly in aqueous solution into Cr^(3+) and xygen. What happens when a solution of potassium chromate is treated with an excess of dilute nitric acid?

K_2Cr_2O_7 acts as a good oxidizing agent in acidic medium underset("Orange")(Cr_(2)O_(7)^(2-)) + 14H^(+) + 6e^(-) rarr underset("Green")(2Cr^(3+)) + 7H_2O In alkaline solution, orange colour of Cr_(2)O_(7)^(2-) chages to yellow colour due to formation of Cr_2O_(4)^(2-) and again yellow colour changes to orange colour on changing the solution to acidic medium underset("Orange")(Cr_2O_7^(2-))+2OH^(_) rarrunderset("Yellow")(Cr_2O_7^(2-))+H_2O underset("Yellow")(2CrO_(4)^(2_-)) + 2H^(+) rarr underset("Orange")(Cr_(2)O_(7)^(2-) + H_(2)O) Cr_(4)^(2-) and Cr_(2)O_(7)^(2-) exist in equilibrium at pH =4 and are interconvertible by altering the pH of the solution. When heated with H_2SO_4 and metal chloride K_2Cr_2O_7 gives vapour of chromyl chloride (CrO_2Cl_2) . Chromyl chloride (CrO_2Cl_2) when passed into aqueous NaOH solution, yellow colour solution of CrO_(4)^(2-) is obtained. This on reaction with lead acetate gives yellow ppt. PbCrO_4 . When H_2O_2 is added to an acidified solution of dichromate ion, a complicated reaction occurs. The products obtained depend on the pH and concentration of dichromate. Cr_2O_7^(2-)+2H^(+) + 4H_(2)O_(2) rarr 2Cr(O_2)+5H_2O A deep blue-violet coloured peroxo compound, CrO(O_2)_2, ' called chromic peroxide is formed. This decomposes rapidly in aqueous solution into Cr^(3+) and xygen. CrO_3 on reaction with HCl and the product on reaction with NaOH(aq) give respectively

If K_(2)Cr_(2)O_7 is source of Cr_(2)O_7^(2-) , what is the normality of solution containing 4.9 g of K_(2)Cr_(2)O_7 in 0.1 litre of solution ?

Number of electrons involved in the reduction of Cr_(2)O_(7)^(2-) ion in acidic solution to Cr^(3+) is

Consider the reaction, Cr_(2)O_(7)^(2-) +14H^(+) +6e^(-) to 2Ce ^(3+) +7H_(2)O What is the quantity of electricity in coulombs needed to reduce 1 mole Cr_(2) O_(7)^(2-) ?

Number of Cr-O sigma bonds in dichromate in Cr_(2)O_(7)^(2-) is

In the reaction the stoichiometry coefficients of Cr_(2)O_(7)^(2-) , NO_2^(-) and H^(+) respectively are Cr_(2)O_(7)^(2-) +NO_(2)^(-) +H^(+) rarr Cr^(3+) +NO_(3)^(-) +H_(2)O

In the reaction the stoichiometry coefficients of Cr_(2)O_(7)^(2-), NO_(2)^(-) and H^(+) respectively are Cr_(2)O_(7)^(2-)+NO_(2)^(-)+H^(+)rarrCr^(3+)+NO_(3)^(-)+H_(2)O

AAKASH SERIES-D-BLOCK ELEMENTS-OBJECTIVE EXERCISE-1 (PERMANGANATE AND DICHROMATE)
  1. When KMnO4, reacts with acidified FeSO4

    Text Solution

    |

  2. Permanganate ion is not isostructural with

    Text Solution

    |

  3. When MnO(2) is fused with KOH in air, it gives

    Text Solution

    |

  4. The number of moles of KMnO4 that will be needed to react completely w...

    Text Solution

    |

  5. The product of oxidation of I with MnO(4) in alkaline medium is

    Text Solution

    |

  6. Number of Cr-O sigma bonds in dichromate in Cr(2)O(7)^(2-) is

    Text Solution

    |

  7. Which of the following oxides give chromic acid in sulphuric acid solu...

    Text Solution

    |

  8. Number of moles of K(2)Cr(2)O(7) reduced by one mole of Sn^(2+) ions i...

    Text Solution

    |

  9. Which of the following statements is/are true A) Na(2) r(2), O(7) is...

    Text Solution

    |

  10. The shape of chromate ion is

    Text Solution

    |

  11. When Na(2)CrO(4), is dissolved in sulphuric acid, it changes to

    Text Solution

    |

  12. Oxidation number of chromium in chromyl chloride is

    Text Solution

    |

  13. For the reaction CrO(4)^(2-)+?rarrCr(2)O(7)^(-2)  the missing ion is

    Text Solution

    |

  14. Strongest oxidant among the following is

    Text Solution

    |

  15. Highest tendency for M^(+3) rarrM^(+2) is in

    Text Solution

    |

  16. Match the following columns

    Text Solution

    |

  17. When MnO(2) is fused with KOH in air, it gives

    Text Solution

    |

  18. Which of the following cannot be oxidised by the acidified solution of...

    Text Solution

    |

  19. Structure of Cr(2)O(7)^(2-) has

    Text Solution

    |

  20. Which one of the following permanga nometric titrations does not give ...

    Text Solution

    |