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JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Topic Test - Chemical Periodicity (5-5-21)

  • question_answer
    The electron affinity values (in \[kJ\,mo{{l}^{-1}}\]) of three halogens \[X,\,Y\] and \[Z\] are respectively  – 349, – 333 and – 325. Then \[X,\,Y\] and \[Z\] are respectively

    A) \[{{F}_{2}},\,C{{l}_{2}}\] and \[B{{r}_{2}}\]

    B) \[C{{l}_{2}},\,{{F}_{2}}\] and \[B{{r}_{2}}\]

    C) \[C{{l}_{2}},\,B{{r}_{2}}\] and \[{{F}_{2}}\]

    D) \[B{{r}_{2}},\,C{{l}_{2}}\] and \[{{F}_{2}}\]

    Correct Answer: B

    Solution :

    [b] In IB group all elements are metals.


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