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JEE Main & Advanced Chemistry The p-block Elements-II / p-ब्लॉक तत्व-II Question Bank Self Evaluation Test - The p-Block Elements (Group 13 and Group 14)

  • question_answer
    \[Pb{{F}_{4}},PbC{{l}_{4}}\] exist but \[PbB{{r}_{4}}\] and \[Pb{{I}_{4}}\] do not exist because of

    A) large size of \[B{{r}^{-}}\] and \[{{I}^{-}}\]

    B) strong oxidising character of \[P{{b}^{4+}}\]

    C) strong reducing character of \[P{{b}^{4+}}\]

    D) low electronegativity of \[B{{r}^{-}}\] and \[{{I}^{-}}\].

    Correct Answer: B

    Solution :

    [b] F and Cl are more oxidising in nature and can achieve Pb in (IV) O.S. but \[B{{r}_{2}}\] and \[{{I}_{2}}\] cannot achieve Pb in (IV) O.S. secondly \[P{{b}^{4+}}\] is strong in oxidising nature and in its presence, \[B{{r}^{-}}\] and \[{{I}^{-}}\] can not exist.


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