This chapter is currently out of syllabus
1
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The appearance of colour in solid alkali metal halides is generally due to
A
interstitial positions
B
F.-centres
C
Schottky defect
D
Frenkel defect
2
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
CsBr crystallises in a body centered cubic lattice. The unit cell length is 436.6 pm. Given that the atomic mass of Cs = 133 and that of Br = 80 amu and Avogadro number being 6.02 $$ \times $$ 1023 mol$$-$$1, the density of CsBr is
A
4.25 g/cm3
B
42.5 g/cm3
C
0.425 g/cm3
D
8.25 g/cm3
3
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells?
A
2
B
4
C
6
D
8
4
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A compound formed by elements X and Y crystallizes in a cubic structure in which the X atoms are at the corners of a cube and the Y atoms are at the face-centers. The formula of the compound is :-
A
XY3
B
X3Y
C
XY
D
XY2
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