This chapter is currently out of syllabus
1
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are :
A
12, 6
B
8, 4
C
6, 12
D
2, 1
2
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is :
A
$${{\sqrt 2 } \over 4} \times 288$$ pm
B
$${{4 } \over \sqrt 3} \times 288$$ pm
C
$${{4 } \over \sqrt 2} \times 288$$ pm
D
$${{\sqrt 3 } \over 4} \times 288$$ pm
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is :
A
C3A4
B
C4A3
C
C2A3
D
C3A
4
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Iron exhibits bcc structure at room temperature. Above 900°C, it transforms to fcc structure. The ratio of density of iron at room temperature to that at 900°C (assuming molar mass and atomic radii of iron remains constant with temperature) is
A
$${{\sqrt 3 } \over {\sqrt 2 }}$$
B
$${{4\sqrt 3 } \over {3\sqrt 2 }}$$
C
$${{3\sqrt 3 } \over {4\sqrt 2 }}$$
D
$${1 \over 2}$$
NEET Subjects
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12