CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2007

  • question_answer
    A radioactive element forms its own isotope after 3 consecutive disintegrations. The particles emitted are

    A)  \[3\,\beta \]-particles

    B)  \[2\,\beta \]-particles and \[1\,\alpha \]-particle

    C)  \[2\,\beta \]-particles and \[1\,\gamma \]-particle

    D)  \[2\,\alpha \]-particles and \[1\,\beta \]-particle

    Correct Answer: B

    Solution :

    To form its own isotope atomic number (Z) should remain same. So, the emission of one \[\alpha \]-particle and two \[\beta \]-particles will maintain the Z same. where \[\alpha \]-particle \[={{\,}_{2}}H{{e}^{4}};\beta \]-particle \[={{\,}_{-1}}{{\beta }^{0}}\]


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