Q19 / 75 · JEE Main 2025 (28 Jan Shift 1) · Chemistry

The incorrect decreasing order of atomic radii is

  • A
    $\mathrm{Si}\gt\mathrm{P}\gt\mathrm{Cl}\gt\mathrm{F}$
  • Correct answer
    B
    $\mathrm{Be}\gt\mathrm{Mg}\gt\mathrm{Al}\gt\mathrm{Si}$
  • C
    $\mathrm{Al}\gt\mathrm{B}\gt\mathrm{N}\gt\mathrm{F}$
  • D
    $\mathrm{Mg}\gt\mathrm{Al}\gt\mathrm{C}\gt\mathrm{O}$

Solution

Correct order of atomic radii : $\mathrm{Be} < \mathrm{Mg}>\mathrm{Al}>\mathrm{Si}$

Hence, the correct answer is option: 'B'.

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