Home
Class 11
CHEMISTRY
Assertion : Photoelectric effect is mos...

Assertion : Photoelectric effect is most readily shown by ceasium metal.
Reason : Photon have easiest access to the surface of ceasium metal .

A

if both assertion and reason are correct and reason is correct explanation for assertion .

B

If both assertion and reason are correct but reason in not correct explanation for assertion.

C

If assertion is correct but reason is incorrect.

D

If both assertion and reason are incorrect.

Text Solution

Verified by Experts

The correct Answer is:
C
Correct reason. In ceasium, the electrons are most loosely held on the surface of the atom due to very small ionisation energy.
Promotional Banner

Topper's Solved these Questions

  • STRUCTURE OF ATOM

    DINESH PUBLICATION|Exercise Reason Type Questions|1 Videos

  • STRUCTURE OF ATOM

    DINESH PUBLICATION|Exercise Comprehension Linked MCQs|42 Videos

  • STATES OF MATTER : GASES AND LIQUIDS

    DINESH PUBLICATION|Exercise Statement Type Question|5 Videos

  • SURFACE CHEMISTRY

    DINESH PUBLICATION|Exercise Ultimate Prepatarory Package|16 Videos

Similar Questions

Explore conceptually related problems

Assertion : Photoelectric effect supports the quantum nature of light. Reason : Photoelectric emission is instantaneous.

Statement-1: Photoelectric effect is easily pronounced by caesium metal. Statement-2: Photoelectric effect is easily pronounced by the metals having high ionization energy.

Assertion: Photoelectric effect proves the particle nature of light. Reason: Photoemission starts as soon as light is incident on the metal surface, provided frequency of incident light is greater than or equal to the threshold frequency.

Assertion: Be exhibit photoelectric effect. Reason: Be has least IP in the s-block.

Assertion : Photoelectric effect is the phenomenon of emission of photon by metal when illuminated by light of suitable frequency. Reason : An electron beam carries sufficient energy to release photons from the metal.

Photoelectric effect is described as the ejection of electrons from the surface of a metal when:

Knowledge Check

  • Assertion : Photoelectric effect supports the quantum nature of light. Reason : Photoelectric emission is instantaneous.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • Statement-1: Photoelectric effect is easily pronounced by caesium metal. Statement-2: Photoelectric effect is easily pronounced by the metals having high ionization energy.

    A
    Statement-1 is true, statement-2 is true, statement-2 is a correct explanation for statement-1
    B
    Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation for statement-1
    C
    Statement-1 is true, statement-2 is false.
    D
    Statement-1 is false, statement-2 is true.

  • Assertion: Photoelectric effect proves the particle nature of light. Reason: Photoemission starts as soon as light is incident on the metal surface, provided frequency of incident light is greater than or equal to the threshold frequency.

    A
    If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.
    B
    If both Assertion and Reason or true but Reason is not the correct explanation of Assertion.
    C
    If Assertion is true, but the Reason is false.
    D
    If Assertion is false but the Reason is true.
    • DINESH PUBLICATION-STRUCTURE OF ATOM-Assertion-Reason Type Questions
    1. Assertion : Photoelectric effect is most readily shown by ceasium met...

      Text Solution

      |

    2. Assertion (A) : An orbital cannot have more than two electrons, more o...

      Text Solution

      |

    3. Assertion : Both position and momentum of an electron can not be dete...

      Text Solution

      |

    4. Assertion : The energy of an electron is mainly determined by principa...

      Text Solution

      |

    5. Assertion (A) : Fe^(3+) (g) ion is more stable than Fe^(2+)(g) ion. ...

      Text Solution

      |

    6. Assertion : An orbital cannot have more than two electrons. Reason :...

      Text Solution

      |

    7. Assertion : The 19th electron in potassium atom enters 4s-orbital an...

      Text Solution

      |

    8. Assertion : Configuration of helium is 1s^(2) Reason : Hund's rule...

      Text Solution

      |

    9. Assertion : Cu^(2+) ion is a coloured ion . Reason : Every ion with...

      Text Solution

      |

    10. Assertion : The electronic configuration of K) (19) is 1s^(2)2s^(2)2p...

      Text Solution

      |

    11. Assertion : X-rays are used to study the interior of objects . Rea...

      Text Solution

      |

    12. Assertion : The outer electronic configuration of Cr and Cu are 3d^...

      Text Solution

      |

    13. Statement 1. An electron can never be found in the nucleus. Statemen...

      Text Solution

      |

    14. Statement 1. An atom is electrically neutral . Statement 2. Number ...

      Text Solution

      |

    15. Statement 1. In potassium atom, 19th electron enters 4s orbital and no...

      Text Solution

      |

    16. Statement 1. Fe^(2+)ion has 24 electrons and its electronic configura...

      Text Solution

      |