Home
Class 12
CHEMISTRY
Assertion : Alkali metal salts give colo...

Assertion : Alkali metal salts give colour to the Bunsen flame .
Reasoning : This is due to excitation of valence shell electrons of sodium ions from lower to higher orbitals

A

Assertion is true but the Reason is false

B

Assertion is false, Reason is true

C

Both Assertion and Reason are true and the Reason is a correct explanation of the Reason.

D

Both Assertion and Reason are true but Reason is not a correct explanation of the assertion.

Text Solution

Verified by Experts

The correct Answer is:
C

Due to excitation of valence electrons of alkali metals , their salts give colour to the bunsen flame
Promotional Banner

Topper's Solved these Questions

  • AIIMS 1999

    AIIMS PREVIOUS YEAR PAPERS|Exercise CHEMISTRY|60 Videos

Similar Questions

Explore conceptually related problems

Alkali metals impart colour to Bunsen flame due to

Alkali metals give coloue in Bunsen flame due to :

Sodium chloride gives a golden yellow colour to the bunsen flame, which is due to

Assertion (A): Alkali metals are strong reducing agents. Reason (R ): They have only one electron to be lost form their valence shells.

Assertion : Berylium does not impart any characteristic colour to the Bunsen flame. Reason : Due to its very high ionization energy, beryllium requires a large amount of energy for excitation of the electrons.

The transition metals and their compounds have paramagnetic properties. This is due to the reason that ions of transition metals have unpaired electrons in (n-1)d orbitals. As the number of unpaired Sc to Mn, the paramagnetic character increases accodingly. From Mn onwards, this character decreases as electrons get paired up. The paramagnetic behaviour is expressed in terms of magnetic moment which is because of the spin of unpaired electron (n). It is given as Magnetic moment = sqrt(n(n+2))B.M Majority of transition metal compounds are coloured both in solid state as well as in aqueous solution. due to d-d transition in which unpaired electrons from the lower energy d-orbitals are transferred to higher energy d-orbitals. The energy of this transition correspond to the radiation in visibe region. Thus, when white light falls on such a transition metal compound, some light energy corresponding to a particular colour is absorbed and one or more electrons are raised from lower energy set of orbitals to those of higher energy. With the absorption of radiations corresponding to specific colour from the white light, a colour known asd the complementary colour is observed or transmitted. The compound which have the same magnetic moment like that of FeCl_(2)

AIIMS PREVIOUS YEAR PAPERS-AIIMS 1998-CHEMISTRY
  1. Catalytic hydrogenation of phenyl diazonium bromide produces

    Text Solution

    |

  2. Addition of water to metallic sodium produces

    Text Solution

    |

  3. The common lead storage battery produces electricity by two hall cell ...

    Text Solution

    |

  4. Calcium carbide reacts with water to produce

    Text Solution

    |

  5. Which of the following aqueous solutions will have the lowest freezing...

    Text Solution

    |

  6. The reaction of HBr with 1-propene in the presence of peroxides will p...

    Text Solution

    |

  7. A zwitter ion is a molecule containing

    Text Solution

    |

  8. Use of helium is preferred over use of hydrogen in airships (e.g., bl...

    Text Solution

    |

  9. Low molecules weight mercaptans are often added to natural gas to

    Text Solution

    |

  10. Nucleotides are composed of two types of sugars

    Text Solution

    |

  11. Assertion: Noble gases can be liquefied. Reason: Attractive forces c...

    Text Solution

    |

  12. Assertion : Alkali metal salts give colour to the Bunsen flame . Rea...

    Text Solution

    |

  13. Assertion: Amongest the halogens, fluorine can oxidise the elements to...

    Text Solution

    |

  14. Assertion:A solution of bromine in C Cl4 is decolorised on passing ace...

    Text Solution

    |

  15. Assertion (A) : When the transition element ionises, the 4s-orbital el...

    Text Solution

    |

  16. Assertion: Nitrogen is unreactive at room temperature but becomes reac...

    Text Solution

    |

  17. Assertion:Fluorescein is an adsorption indicator. Reasoning : The in...

    Text Solution

    |

  18. Statement I: All enzymes are protiens but all proteins are not enzymes...

    Text Solution

    |

  19. Assertion (A): Alkali metals are strong reducing agents. Reason (R )...

    Text Solution

    |

  20. Assertion (A): May endothermic reactions that are not spontaneous at ...

    Text Solution

    |