Electronic configuration of four elements A , B , C and D are given below : (A) 1 s 2 2 s 2 2 p 3 (B) 1 s 2 2 s 2 2 p 4 (C) 1 s 2 2 s 2 2 p 5 (D) 1 s 2 2 s 2 2 p 2 Which of the following is the correct order of increasing electronegativity (Pauling's scale)?

Chemistry · Periodicity of Elements and Periodic Properties

JEE Main 2025 — 2 April, Evening Shift — Question 5

Electronic configuration of four elements $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $D$ are given below :

(A) $1 s^{2} 2 s^{2} 2 p^{3}$

(B) $1 s^{2} 2 s^{2} 2 p^{4}$

(D) $1 s^{2} 2 s^{2} 2 p^{2}$

Which of the following is the correct order of increasing electronegativity (Pauling's scale)?

(A) $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{3} \Rightarrow N$

(B) $1 s^{2} 2 s^{2} 2 p^{4} \Rightarrow 0$

(D) $1 s^{2} 2 s^{2} 2 p^{2} \Rightarrow C$

Order of electronegativity

\begin{aligned} & \mathrm{F}>\mathrm{O}>\mathrm{N}>\mathrm{C} \\& \mathrm{C}>\mathrm{B}>\mathrm{A}>\mathrm{D} \end{aligned}

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Exam: JEE Main 2025
Paper: 2 April, Evening Shift
Subject: Chemistry
Chapter: Periodicity of Elements and Periodic Properties
Topic: Periodicity in Chemical Properties (Ionization Energy, Electron Affinity, Electronegativity)