NEET UG 2021 · Chemistry · Question 81
NEET 2021 Chemistry, question 81
Question 81 of the NEET 2021 paper (code O1) is a Chemistry question from The Solid State. Its idea, Number and Location of Voids, was asked 3 times, in 2021 and 2023, across NEET 2017–2026. The NTA final answer key gives option 2.
Updated 2026-10-08
Q81 · Chemistry
Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are :
- 12, 1
- 212, 6Official answer
- 38, 4
- 46, 12
Official answer: option 2 · NTA final answer key
Same idea
Number and Location of Voids, in other papers
NEET asked this idea 3 times, in 2021 and 2023. The other 2 questions below.
- 2023 Q59A compound is formed by two elements A and B. The element B forms cubic close packed structure and atoms of A occupy 1/3 of tetrahedral…Numerical · Medium
- 2023 Q89What fraction of one edge centred octahedral void lies in one unit cell of fcc?One-line MCQ · Medium
Number and Location of Voids: every question and how it was framed
The chapter
The Solid State in ten years of NEET
10 questions from 2017–2026, asked in 7 of 10 papers, about 0.9 a paper. The Solid State alone had 10.