Statement-1: Third ionisation energy of phosphorous is larger than sulphur.
Statement-2: There is a larger amount of stability associated with filled s- and P· sub-shells (a noble gas electron configuration) which corresponds lo having eight electrons in the valence shell of an atom or ion.

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Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.

Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1.

Statement-1 is True, Statement-2 is False.

Statement-1 is False, Statement-2 is True.

answer is D.

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Detailed Solution

P has more stability than S due to the orbital's partial filling, hence ${({IE}_{1})}_{P} > {({IE}_{1})}_{S}$ . In order to have 8 electrons in the valence shell of an atom or an ion, the s and p subshells must be filled, which is related to greater stability.

$P - 15 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{3}$