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JEEMAIN-2017
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Q)
Δ
U
is equal to
(
1
)
A
d
i
a
b
a
t
i
c
w
o
r
k
(
2
)
I
s
o
t
h
e
r
m
a
l
w
o
r
k
(
3
)
I
s
o
c
h
o
r
i
c
w
o
r
k
(
4
)
I
s
o
b
a
r
i
c
w
o
r
k
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