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JEE Main 202621 JanuaryMorning Shift
Exam
JEE Main
Year
2026
Date
21 January
Shift
Morning Shift
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

JEE Main 2026 · 21 January · Morning Shift · Chemistry · Classification of Elements and Periodicity in Properties

Which of the following represents the correct trend for the...

Which of the following represents the correct trend for the mentioned property ?
A. F>P>S>B\mathrm{F}>\mathrm{P}>\mathrm{S}>\mathrm{B} \ \ \ - \ \ \ First Ionization Energy
B. Cl>F>S>P\mathrm{Cl}>\mathrm{F}>\mathrm{S}>\mathrm{P} \ \ \ - \ \ \ Electron Affinity
C. K>Al>Mg>B\mathrm{K}>\mathrm{Al}>\mathrm{Mg}>\mathrm{B} \ \ \ - \ \ \ Metallic character
D. K2O>Na2O>MgO>Al2O3\mathrm{K}_{2} \mathrm{O}>\mathrm{Na}_{2} \mathrm{O}>\mathrm{MgO}>\mathrm{Al}_{2} \mathrm{O}_{3} \quad \ \ \ - \ \ \ Basic character
Choose the correct answer from the options given below :

Options

  1. AB and C only
  2. BA, B and D only
  3. CA and B only
  4. DA, B, C and D

Correct answer

B. A, B and D only

Step-by-step solution

A. F > P > S > B (IE₁): F has highest IE₁, P > S due to half-filled 3p33p^3 stability, B has lowest. Correct
B. Cl > F > S > P (EA): Cl has highest EA (F smaller, more repulsion), S > P (half-filled p-orbital). Correct
C. K > Al > Mg > B (Metallic character): Incorrect. Mg (Group 2) is more metallic than Al (Group 13) in same period. Correct order: K > Mg > Al > B
D. K2O>Na2O>MgO>Al2O3K_2O > Na_2O > MgO > Al_2O_3 (Basic character): Follows electropositive nature. Al2O3Al_2O_3 is amphoteric. Correct
Correct statements: A, B and D only.
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