Verified Solution • 2025–26 Session moderate

QJEEM21Ch1f98: JEE Main 2021 Chemistry - Class 11 JEEM21Ch1f98 Solution: The correct order of ionic radii for the ions, P 3 − , S 2 − ,…

The correct order of ionic radii for the ions, P3−, S2−, Ca2+, K+, Cl− is :

Multiple Choice Options

  • A P3− > S2− > Cl− > K+ > Ca2+
  • B Cl− > S2− > P3− > Ca2+ > K+
  • C P3− > S2− > Cl− > Ca2+ > K+
  • D K+ > Ca2+ > P3− > S2− > Cl−

Step-by-Step Verified Solution

P3− > S2− > Cl− > K+ > Ca2+ (Correct order of ionic radii)

all the given species are isoelectronic species. In isoelectronic species size increases with increase of negative charge and size decreases with increase in positive charge.

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