This chapter is currently out of syllabus
1
JEE Main 2019 (Online) 10th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
A compound of formula A2B3 has the hcp lattice. Which atom forms the hcp lattice and what fraction of tetrahedral voids is occupied by the other atoms :
A
hcp lattice - A, $${1 \over 3}$$ Tetrahedral voids-B
B
hcp lattice - B, $${1 \over 3}$$ Tetrahedral voids - A
C
hcp lattice - A, $${2 \over 3}$$ Tetrahedral voids - B
D
hcp lattice - B, $${2 \over 3}$$ Tetrahedral voids - A
2
JEE Main 2019 (Online) 10th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Which premitive unit cell has unequal edge lengths (a $$ \ne $$ b $$ \ne $$ c) and all axial angles different from 90o?
A
Hexagonal
B
Tetragonal
C
Triclinic
D
Monoclinic
3
JEE Main 2019 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
At 100oC, copper (Cu) has FCC unit cell structure with cell edge length of x $$\mathop A\limits^o $$. What is the approximate density of Cu (in g cm$$-$$3) at this temperature?
[Atomic Mass of Cu = 63.55 u]
A
$${{205} \over {{x^3}}}$$
B
$${{105} \over {{x^3}}}$$
C
$${{211} \over {{x^3}}}$$
D
$${{422} \over {{x^3}}}$$
4
JEE Main 2018 (Offline)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Which type of ‘defect’ has the presence of cations in the interstitial sites?
A
Metal deficiency defect
B
Schottky defect
C
Vacancy defect
D
Frenkel defect
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