Verified Solution • 2025–26 Session moderate

QJEEM21Chc918: JEE Main 2021 Chemistry - Class 12 JEEM21Chc918 Solution: Which one of the following lanthanoids does not form MO 2 ? [M…

Which one of the following lanthanoids does not form MO2? [M is lanthanoid metal]

Multiple Choice Options

  • A Nd
  • B Dy
  • C Yb
  • D Pr

Step-by-Step Verified Solution

Nd (60) = 4f4 6s2

Pr (59) = 4f3 6s2

Dy (66) = 4f10 6s2

Yb (70) = 4f14 6s2

Yb+2 has fully-filled 4f orbital, it will require very large amount of energy to reach +4 oxidation state.

Related Learning Resources & Exam Preparation

JEE Main PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring