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JEE Main & Advanced Chemistry The s-Block Elements / s-ब्लॉक के तत्व Question Bank Self Evaluation Test - The s-Block Elements

  • question_answer
    A chloride dissolves appreciably in cold water. When placed on a Pt wire in bunsen flame, no distinctive colour is noted. Which cation could be present?

    A) \[B{{e}^{2+}}\]         

    B) \[B{{a}^{2+}}\]

    C) \[P{{b}^{2+}}\]                     

    D) \[C{{a}^{2+}}\]

    Correct Answer: A

    Solution :

    [a] Due to very high I.E. of Be, its valence electrons require high energy to remove (excite) which is not available in bunsen flame hence \[B{{e}^{2+}}\]ions do not impart colour to the flame.


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