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    NEET 2026 Preparation Tips for Chemistry, Biology and Physics

    Planck's quantum theory MCQ - Practice Questions with Answers

    Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET

    Quick Facts

    • 13 Questions around this concept.

    Solve by difficulty

    The energy required to break one mole of Cl-Cl bonds in Cl_{2}\: is\: 242\: kJ mol^{-1}. The longest wave-length of light capable of breaking a single Cl-Cl bond  is

    \left ( c= 3\times 10^{8} m\: s^{-1}\: and \: N_{A}= 6.02\times 10^{23}mol^{-1}\right )

    Concepts Covered - 1

    Planck’s quantum theory

    Atom and molecules could emit (or absorb) energy only in discrete quantities known as quanta and not in a continuous manner.

    1. The nature of emission of radiation from hot bodies (black -body radiation).

    2. Ejection of electrons from a metal surface when radiation strikes it (photoelectric effect).

    3. Variation of heat capacity of solids as a function of temperature.

    4. Line spectra of atoms with special reference to hydrogen.

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    Planck’s quantum theory

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    Books

    Reference Books

    Planck’s quantum theory

    Chemistry Part I Textbook for Class XI

    Page No. : 39

    Line : 40

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