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JEE Main & Advanced Chemistry The p-block Elements-II / p-ब्लॉक तत्व-II Question Bank Mock Test - The p-Block Elements (Groups 13, 14)

  • question_answer
    \[C{{a}_{2}}{{B}_{6}}{{O}_{11}}+2N{{a}_{2}}C{{O}_{3}}\to X-2CaC{{O}_{3}}+2NaB{{O}_{2}}.\] The compound X in the above reaction is

    A) \[N{{a}_{2}}{{B}_{4}}{{O}_{7}}\]   

    B) \[HB{{O}_{2}}\]

    C) \[{{H}_{3}}B{{O}_{3}}\]       

    D) \[{{H}_{2}}{{B}_{4}}{{O}_{7}}\]

    Correct Answer: A

    Solution :

    [a] \[\underset{Colemanite}{\mathop{C{{a}_{2}}{{B}_{6}}{{O}_{11}}}}\,+2N{{a}_{2}}C{{O}_{3}}\to \underset{(X)\,(Borax)}{\mathop{N{{a}_{2}}{{B}_{4}}{{O}_{7}}}}\,+2NaB{{O}_{2}}+2CaC{{O}_{3}}\]


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