Home
Class 12
CHEMISTRY
The flame colours of metal ions are due ...

The flame colours of metal ions are due to

A

frenkel defect

B

schottky defect

C

metal deficiency defect

D

metal excess defect

Text Solution

Verified by Experts

The correct Answer is:
D
The flame colours of metal ions are due to metal excess defect. These type of crystals are generally coloured. This is due to the presence of free electrons. These electrons get excited easily to higher energy levels by absorption of centain wave lengths from the visible light and therefore, the compounds appear coloured.
Promotional Banner

Topper's Solved these Questions

  • KARNATAKA CET 2002

    KCET PREVIOUS YEAR PAPERS|Exercise CHEMISTRY (MCQ.s)|60 Videos

  • KARNATAKA CET 2005

    KCET PREVIOUS YEAR PAPERS|Exercise CHEMISTRY|60 Videos

Similar Questions

Explore conceptually related problems

Blue colour of sea water is due to

Red colour of tomato is due to

The red colour of rhodophyta is due to the preponderance:

The colour of d-block elements is due to :

The yellow colour of urine is due to the presence of

When sodium is dissolved in liquid ammonia, a solution of deep blue colour is obtained. The colour of the solution is due to

In the brown ring test , the brown colour of the ring is due to

KCET PREVIOUS YEAR PAPERS-KARNATAKA CET 2003-CHEMISTRY
  1. A galvix cell is constructed using the redox reaction, (1)/(2)H(2(g)...

    Text Solution

    |

  2. Same amount of electric current is passed through solutions of AgNO(3)...

    Text Solution

    |

  3. The flame colours of metal ions are due to

    Text Solution

    |

  4. The order of reactivities of methyl halides in the formation of Grigna...

    Text Solution

    |

  5. The reaction of an organic compound with ammonia followed by nitration...

    Text Solution

    |

  6. The percentage S-character of the hybrid orbitals in methane, ethene a...

    Text Solution

    |

  7. In the manufacture of sulphuric acid by contact process, Tyndall box i...

    Text Solution

    |

  8. The pH value of gastric juice in human stomach is about 1.8 and in the...

    Text Solution

    |

  9. The number of alpha and beta particles emitted during the transformati...

    Text Solution

    |

  10. When chlorine is passed through warm benzene in presence of the sunlig...

    Text Solution

    |

  11. A colourless crystalline salt 'x' is soluble in dilute HCl. On adding ...

    Text Solution

    |

  12. Which metal is used to make alloy steel for armour plates, safes and h...

    Text Solution

    |

  13. Iodoform reaction is answered by all, except

    Text Solution

    |

  14. A gaseous carbon compound is soluble in dilute HCl. The solution on tr...

    Text Solution

    |

  15. Which of the following statements is incorrect regarding benzyl chlori...

    Text Solution

    |

  16. A signature, written in carbon pencil weighs 1 mg. what is the number ...

    Text Solution

    |

  17. NH(3) and HCl gas are introduced simultaneously from the two ends of a...

    Text Solution

    |

  18. A gas formed by the action of alcoholic KOH on ethyl iodie, decolouris...

    Text Solution

    |

  19. Which of the following is not a characteristic of chemisorption ?

    Text Solution

    |

  20. The concentration of electrolyte required to coagulate a given amount ...

    Text Solution

    |