NEET UG 2018 · Chemistry · Question 49
NEET 2018 Chemistry, question 49
Question 49 of the NEET 2018 paper (code AA) is a Chemistry question from The p-Block Elements (Class 11). Its idea, Atomic Size Anomaly in Group 13, was asked only this once in NEET 2017–2026. The CBSE official answer key gives option 4.
Updated 2026-10-08
Q49 · Chemistry
The correct order of atomic radii in group 13 elements is
- 1B < Ga < Al < Tl < In
- 2B < Al < Ga < In < Tl
- 3B < Al < In < Ga < Tl
- 4B < Ga < Al < In < TlOfficial answer
Official answer: option 4 · CBSE official answer key
Same idea
The only question on Atomic Size Anomaly in Group 13
No other NEET paper from 2017–2026 tested this exact idea.
Atomic Size Anomaly in Group 13: every question and how it was framed
The chapter
The p-Block Elements (Class 11) in ten years of NEET
13 questions from 2017–2026, asked in 7 of 10 papers, about 1.3 a paper. p-Block (Group 13-14) alone had 12.