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  5. Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति

NEET Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति NEET PYQ-Classification Elements In Properties

  • question_answer
    Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?                                                                                                   [AIPMT (S) 2005]

    A)  \[Cl<F<S<O\] 

    B)  \[O<S<F<Cl\]

    C)  \[S<O<Cl<F\]

    D)       \[F<Cl<O<S\]

    Correct Answer: B

    Solution :

    The correct order of electron gain enthalpy
    (electron affinity) is          \[O~<~S~<~F~<~Cl\]
    (electron affinity              \[O~<~S~<~F~<~CI\]
    (In eV)                                       1.48   2.07  3.45  3.61


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