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JEE Advanced 2015 Paper 2
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© examsnet.com
Question : 28
Total: 60
A closed vessel with rigid walls contains 1 mol of
92
238
U
1 and mol of air at 298 K.Considering complete decay of
92
238
U
to
82
206
P
b
,the ratio of the final pressure to the initial pressure of the system at 298 K is
Your Answer:
Validate
Solution:
In conversion of
92
238
U
to
82
206
P
b
,8α-particles and 6β particles are ejected.
The number of gaseous moles initially = 1 mol
The number of gaseous moles finally=1+8;(1 mol from air and 8 mol of
2
H
e
4
)
So the ratio
=
9
1
=
9
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