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JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Self Evaluation Test - Structure of Atom

  • question_answer
    A system irradiated for 10 min. is found to absorb \[3\times {{10}^{18}}\]quanta per sec. If the amount of substance decomposed is\[~3\times {{10}^{-3}}mol\] \[({{N}_{A}}=6\times {{10}^{23}})\]. The quantum efficiency of the reaction is

    A) 2.5

    B) 2

    C) 1.5       

    D) 1

    Correct Answer: D

    Solution :

    [d] Quantum efficiency \[=\frac{Number\text{ }of\text{ }moles\text{ }of\text{ }substance\text{ }reacted}{Number\text{ }of\text{ }Quanta\text{ }absorbed}\]  \[=\frac{3\times {{10}^{-3}}\times 6\times {{10}^{23}}}{3\times {{10}^{18}}\times 60\times 10}=1\]


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