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NEET Sample Paper NEET Sample Test Paper-5

  • question_answer
    The metal that dissolves in liquid ammonia giving a dark blue coloured solution is

    A)  tin                 

    B)  lead

    C)  sodium            

    D)  silver

    Correct Answer: C

    Solution :

    Alkali metals dissolve in liquid \[N{{H}_{3}}\] to give deep blue coloured solution. \[M+\underset{excess}{\mathop{N{{H}_{3}}}}\,\xrightarrow{{}}{{M}^{+}}{{(N{{H}_{3}})}_{x}}+{{e}^{-}}\underset{ammoniated\,electron}{\mathop{{{(N{{H}_{3}})}_{x}}}}\,\] The blue colour of the solution is due to the ammoniated electrons.   


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