JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Critical Thinking

  • question_answer
    Arrange \[S,\,O\] and \[Se\] in ascending order of electron affinity [Roorkee 1990]

    A) Se < S < O

    B) Se < O < S

    C) S < O < Se

    D) S < Se < O

    Correct Answer: A

    Solution :

    Correct order of electron affinity is Se < S < O. In a group electron affinity decreases with increase in atomic number.


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