Home
Class 12
CHEMISTRY
Anhydrous cobalt(II) chloride is blue in...

Anhydrous cobalt(II) chloride is blue in blue in colour but on dissolving in water it changes to pink in colour because

A

Its oxidation state changes.

B

It magnetic character changes

C

Its coordination number changes.

D

In water it shows fluorescence

Text Solution

Verified by Experts

The correct Answer is:
C
`Co^(11) Cl_(2)` has a blue colour in tetrahedral geometry. If chages to pink in colour with the change in coordination number to six.
Promotional Banner

Topper's Solved these Questions

  • THE D- AND F- BLOCK ELEMENTS

    DISHA PUBLICATION|Exercise EXERCISE - 1 CONCEPT BUILDER (TOPIC 3: LANTHANOIDS AND ACTINOIDS)|20 Videos

  • THE D- AND F- BLOCK ELEMENTS

    DISHA PUBLICATION|Exercise EXERCISE - 2 CONCEPT APPLICATOR|30 Videos

  • THE D- AND F- BLOCK ELEMENTS

    DISHA PUBLICATION|Exercise EXERCISE - 1 CONCEPT BUILDER (TOPIC CHARACTERISTICS OF D-BLOCK ELEMENTS )|20 Videos

  • SURFACE CHEMISTRY

    DISHA PUBLICATION|Exercise Exercise-2 :Concept Applicator|30 Videos

  • The p-Block Elements (Group 13 and Group 14)

    DISHA PUBLICATION|Exercise Exercise-2: Concept Applicator|30 Videos

Similar Questions

Explore conceptually related problems

Colour of cobalt chloride solution is:

Colour of cobalt chloride solution is:

Cobalt chloride is blue in anhydrous state . In contact with water vapours it turns

DISHA PUBLICATION-THE D- AND F- BLOCK ELEMENTS -EXERCISE - 1 CONCEPT BUILDER (TOPIC 2 : COMPOUNDS OF TRANSITION METALS)
  1. From a solution Cuso4 the metal used to recover copper is

    Text Solution

    |

  2. Anhydrous cobalt(II) chloride is blue in blue in colour but on dissolv...

    Text Solution

    |

  3. Which of the following can be employed for the conversion of potassium...

    Text Solution

    |

  4. In vapour state Cu(NO3)2 and Cu2(CH3COO)4.2H2O exist as

    Text Solution

    |

  5. Which of the following is false

    Text Solution

    |

  6. Which of the following is used as purgative in medicine?

    Text Solution

    |

  7. Mercury is the only metal which is liquid at 0^@C this is due to its

    Text Solution

    |

  8. Which compound is formed when iron reacts with carbon?

    Text Solution

    |

  9. The aqueous solution of transition metal salt changes colour from pink...

    Text Solution

    |

  10. Which of the comparison Zn, Cd, Hg is/are incorrect? (I) ZnCl(2) is ...

    Text Solution

    |

  11. The oxoanion in which the oxidation state of the central atom is same ...

    Text Solution

    |

  12. When an aqueous solution of copper (II) sulphate is saturated with amm...

    Text Solution

    |

  13. When concentrated HCI is added to an aqueous solution of CoCl(2...

    Text Solution

    |

  14. Colourless solutions of the following four salts are placed separately...

    Text Solution

    |

  15. The correct statements of the following

    Text Solution

    |

  16. Among the following, the compound that is both paramagnetic and colour...

    Text Solution

    |

  17. K(2)Cr(2)O(7) on heating with aqueous NaOH gives

    Text Solution

    |

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

    Text Solution

    |

  19. The oxidation state of chromium in the final product formed by the rea...

    Text Solution

    |

  20. The final products formed on the addition of KI to copper sulphate sol...

    Text Solution

    |