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JEEMAIN and NEET
>>
NEET PAST PAPERS
>>
2007
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Q)
If
N
a
C
l
is doped with
10
−
4
mole % of
S
r
C
l
2
, the concentrate of cation vacancies will be :
(
N
A
=
6.02
×
10
23
)
m
o
l
−
1
( A )
6.02
×
10
14
m
o
l
−
1
( B )
6.02
×
10
16
m
o
l
−
1
( C )
6.02
×
10
15
m
o
l
−
1
( D )
6.02
×
10
17
m
o
l
−
1
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