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JEE Main202529 Jan 2025Evening ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

First ionisation enthalpy values of first four group 15 elements are given below. Choose the correct value for the element that is a main component of apatite family :

Options

  1. A1402 ~kJ ~mol ⁻¹
  2. B834 ~kJ ~mol ⁻¹
  3. C1012 ~kJ ~mol ⁻¹
  4. D947 ~kJ ~mol ⁻¹

Correct answer

C. 1012 ~kJ ~mol ⁻¹

Step-by-step solution

The main component of apatite family is phosphorus. Order of IE ₁ of group 15 elements N > P > As > Sb IE of phosphorus =1012 ~kJ ~mol ⁻¹ .

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