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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
    Borax is converted into crystalline boron by the following steps: \[Borax\xrightarrow{X}{{H}_{3}}B{{O}_{3}}\xrightarrow{\Delta }{{B}_{2}}{{O}_{3}}\xrightarrow[\Delta ]{Y}B\] X and Y are respectively:

    A) \[HCl,Mg\]        

    B) \[HCl,C\]

    C) \[C,Al\]                         

    D) \[HCl,Al\]

    Correct Answer: D

    Solution :

    [d] \[Borax\xrightarrow{HCl}{{H}_{3}}B{{O}_{3}}\] \[{{B}_{2}}{{O}_{3}}~\xrightarrow{HCl}B\left( crystalline \right)\] \[{{B}_{2}}{{O}_{3}}~\xrightarrow[\Delta ]{Mg}B\left( Amorphous \right)\]


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