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1
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm$$-$$3. The molar mass of the metal is
(NA Avogadro's constant = 6.02 $$ \times $$ 1023 mol$$-$$1)
A
27 g mol$$-$$1
B
20 g mol$$-$$1
C
40 g mol$$-$$1
D
30 g mol$$-$$1
2
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Structure of a mixed oxide is cubic close packed (ccp). The cubic unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are cooupied by a monovalent metal B. The formula of the oxide is
A
ABO2
B
A2BO2
C
A2B3O4
D
AB2O2
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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A metal crystallises with a face-centred cubic lattice. The edge of the unit cell is 408 pm. The diameter of the metal atom is
A
288 pm
B
408 pm
C
144 pm
D
204 pm
4
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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The number of octahedral void(s) per atom present in a cubic close-packed structure is
A
1
B
3
C
2
D
4
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