Q4 / 150 · MHT CET 2024 (11 May Shift 1) · Chemistry

Which element from following has lowest ionization enthalpy $\left(\mathrm{IE}_1\right)$ ?

  • A
    Cu
  • Correct answer
    B
    Sc
  • C
    Mn
  • D
    Zn

Solution

The ionization enthalpy $\left(\mathrm{IE}_1\right)$ of the elements of the 3 d transition series increases gradually from left to right with some irregularities. Therefore, among the given elements, Sc has the lowest ionization enthalpy $\left(\mathrm{IE}_1\right)$.

Hence, the correct answer is option: 'B'.

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