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1
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphite :
A
is an allotropic form of diamond
B
has molecules of variable molecular masses like polymers
C
has carbon atoms arranged in large plates of rings of strongly bound carbon atoms with weak interplate bonds
D
is a non-crystalline substance
2
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
In XeF2, XeF4, XeF6 the number of lone pairs of Xe are respectively :
A
2, 3, 1
B
1, 2, 3
C
4, 1, 2
D
3, 2, 1
3
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
In case of nitrogen, NCl3 is possible but not NCl5 while in case of phosphorous, PCl3 as well as PCl5 are possible. It is due to :
A
availability of vacant d orbitals in P but not in N
B
lower electronegativity of P than N
C
lower tendency of H - bond formation in P than N
D
occurrence of P in solid while N in gaseous state at room temperature
4
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Number of sigma bonds in P4O10 is :
A
6
B
7
C
17
D
16
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