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KCET 2015 Chemistry Solved Paper
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© examsnet.com
Question : 32
Total: 60
For one of the element various successive ionization enthalpies
(
in
kJ
mol
−
1
)
are given below
I.E
1
st
2
nd
3
rd
4
th
5
th
577.5
1810
2750
11,580
14,820
The element is
Si
P
Al
Mg
Validate
Solution:
There is a large jump between
IE
3
and
IE
4
suggest that the element has three valence electrons.
Therefore, from the given elements, the element having three valence electrons is Al.
© examsnet.com
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