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 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
3
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
4
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The pyknometric density of sodium chloride crystal is 2.165 $$ \times $$ 103 kg m$$-$$3 while its X-ray density is 2.178 $$ \times $$ 103 kg m$$-$$3. The fraction of unoccupied sites in sodium chloride crystal is
A
5.96
B
5.96 $$ \times $$ 10$$-$$2
C
5.96 $$ \times $$ 10$$-$$1
D
5.96 $$ \times $$ 10$$-$$3
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