JEE Main 2022 · 27 Jul · Shift 2 · Chemistry Q66

ChemistrySingle correct+4 / -1Question 66 of 90

Outermost electronic configurations of four elements A, B, C, D are given below :

(A) $3s^2$
(B) $3s^23p^1$
(C) $3s^23p^3$
(D) $3s^23p^4$

The correct order of first ionization enthalpy for them is :

(A) < (B) < (C) < (D)

(B) < (A) < (D) < (C)

(B) < (D) < (A) < (C)

(B) < (A) < (C) < (D)

Answer and worked solution

Official answer: B

Elements. Mg, Al, P, S. First ionization enthalpies: Al (578) < Mg (738) < S (1000) < P (1012) kJ mol $^{-1}$ .

(B)

Topics:Ionisation enthalpy

JEE Main 2022 · 27 Jul · Shift 2, Chemistry question 66