NEET Sample Paper NEET Sample Test Paper-39

  • question_answer The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr (24) and Mn (25)is

    A)  V > Mn > Cr > Ti

    B)  Mn > Cr > Ti > V

    C)  Ti > V > Cr > Mn

    D)  Cr > Mn > V > Ti

    Correct Answer: D

    Solution :

    \[{{\,}_{23}}Ti:3{{s}^{2}},4{{s}^{2}}\xrightarrow{I{{E}_{1}}}3{{d}^{2}},4{{s}^{1}}\]
    \[{{\,}_{23}}V:3{{d}^{3}},4{{s}^{2}}\xrightarrow{I{{E}_{1}}}3{{d}^{3}},4{{s}^{1}}\]
    \[{{\,}_{24}}Cr:3{{d}^{5}},4{{s}^{1}}\xrightarrow{I{{E}_{1}}}3{{d}^{5}}\xrightarrow[half-filled]{I{{E}_{2}}\,from}\text{maximum}\]
    \[{{\,}_{25}}Mn:3{{d}^{5}},4{{s}^{2}}\xrightarrow{I{{E}_{1}}}3{{d}^{5}},4{{s}^{1}}\]

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