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NEET Sample Paper NEET Sample Test Paper-81

  • question_answer
    A flame test is an analytic procedure used in chemistry to detect the presence of certain elements, primarily metal ions, based on each elements characteristic emission spectrum. The colour of flamed in general also depends on temperature. Which of the following does not give flame test?

    A)  Sr                               

    B)  Be

    C)  Ra                              

    D)  Li

    Correct Answer: B

    Solution :

    \[\operatorname{Be} \left( 1{{s}^{2}}2{{s}^{2}} \right)\] all the orbitals are filled and the size of Be is small, thus it does not allow excitation of electron and hence give no colour to the flame


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