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Basics of Organic Chemistry
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1
JEE Main 2014 (Offline)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
CsCl crystallises in body centred cubic lattice. If ‘a’ is its edge length then which of the following expressions is correct?
A
$${r_{C{s^ + }}} + {r_{C{l^ - }}} = {{\sqrt 3 } \over 2}a$$
B
$${r_{C{s^ + }}} + {r_{C{l^ - }}} = {3 \over 2}a$$
C
$${r_{C{s^ + }}} + {r_{C{l^ - }}} = \sqrt 3 a$$
D
$${r_{C{s^ + }}} + {r_{C{l^ - }}} = 3a$$
2
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which of the following exists as covalent crystals in the solid state?
A
Silicon
B
Sulphur
C
Phosphorous
D
Iodine
3
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Lithium forms body centred cubic structure. The length of the side of its unit cell is 351 pm. Atomic radius of the lithium will be :
A
75 pm
B
300 pm
C
240 pm
D
152 pm
4
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face centre positions. If one atom of B is missing from one of the face centred points, the formula of the compound is :
A
AB2
B
A2B3
C
A2B5
D
A2B
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