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NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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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:

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Correct option: A

1012 \mathrm{~kJ} \mathrm{~mol}^{-1}

Option A (

1012 \mathrm{~kJ} \mathrm{~mol}^{-1}

) is correct because it corresponds to the ionization enthalpy of Phosphorus, a key component of the apatite family.

More Questions from CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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The elements with zero electron affinity are S-I:

\mathrm{Cu}^{+2}

paramagnetic.

S-II: All the orbitals present in

\mathrm{Cu}^{+2}

ion are doubly occupied. Which of the following is the most electropositive element? The law of Octaves is not applicable to: Assertion (A): Mendeleev's arranged elements in horizontal rows and vertical columns.
Reason (R): Mendeleev's ignored the order of atomic weight thinking that the atomic measurements might be incorrect. Which of the following electronic configuration does not belong to same block as others?