JEE Mains · Chemistry · STD 11 - 3. Classification of elements and periodicity in properties
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 :
- A \(1402 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
- B \(834 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
- C \(1012 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
- D \(947 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
Answer & Solution
Correct Answer
(C) \(1012 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
Step-by-step Solution
Detailed explanation
The main component of apatite family is phosphorus. Order of \(\mathrm{IE}_1\) of group 15 elements \(\mathrm{N}>\mathrm{P}>\mathrm{As}>\mathrm{Sb}\) IE of phosphorus \(=1012 \mathrm{~kJ} \mathrm{~mol}^{-1}\).
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